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A
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HUMAN NECESSITIES
B
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PERFORMING OPERATIONS; TRANSPORTING
C
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CHEMISTRY; METALLURGY
D
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TEXTILES; PAPER
E
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FIXED CONSTRUCTIONS
F
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MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
G
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PHYSICS
G01
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INSTRUMENTS
G01
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MEASURING (counting G06M)TESTING
G01B
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MEASURING LENGTH, THICKNESS, OR SIMILAR LINEAR DIMENSIONSMEASURING ANGLESMEASURING AREASMEASURING IRREGULARITIES OF SURFACES OR CONTOURS (measuring human body, see the relevant places, where such exist, e.g. A41H 1/00 , A43D 1/02 , A61B 5/103; measuring appliances combined with walking-sticks A45B 3/08; sorting according to dimensions B07; methods or devices for measuring, specially adapted for metal-rolling mills B21B 38/00; tool-setting or drawing instruments not specially modified for measuring B23B 49/00 , B23Q 15/00 to B23Q 17/00 , B43L; measuring or gauging equipment specially adapted for grinding or polishing operations B24B 49/00; combinations of measuring devices with writing-implements B43K 29/08; geodetical, nautical or aeronautical measuring, surveying, rangefinding G01C; photogrammetry G01C 11/00; measuring force or stress, in general G01L 1/00; investigating or analysing surface structures in atomic ranges using scanning-probe techniques G01N 13/00; investigating or analysing particle size, investigating or analysing surface area of porous material G01N 15/00; radio direction-finding, determining distance or velocity by use of propagation effects, e.g. Doppler effect, propagation time, of radio waves, analogous arrangements using other waves G01S; geophysical measuring G01V; measuring length or roll diameter of film in cameras or projectors G03B 1/60; combinations of measuring devices with means for controlling or regulating G05; methods or arrangements for converting the position of a manually-operated writing or tracing member into an electrical signal G06K 11/00; measuring elapsed travel of recording medium in recording or playback equipment, sensing diameter of record in autochange gramophones G11B; details of scanning-probe apparatus, in general G12B 21/00; means structurally associated with electric rotary current collectors for indicating brush wear H01R 39/58; indicating consumption of electrodes in arc lamps H05B 31/34)
G01C
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MEASURING DISTANCES, LEVELS, OR BEARINGSSURVEYINGNAVIGATIONGYROSCOPIC INSTRUMENTSPHOTOGRAMMETRY (measuring dimensions or angles of objects G01B; measuring liquid level G01F; measuring intensity or direction of magnetic fields, other than the earth's field, in general G01R; radio navigation, determining distance or velocity by use of propagation effects, e.g. Doppler effect, propagation time, of radio waves, analogous arrangements using other waves G01S; optical systems therefor G02B; maps, globes G09B)
G01D
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MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLEARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED BY A SINGLE OTHER SUBCLASSTARIFF METERING APPARATUSMEASURING OR TESTING NOT OTHERWISE PROVIDED FOR (means structurally associated with lightning or other overvoltage discharging apparatus for recording the operation thereof G01R; displaying information in general G09F; recording in a way which requires playback through a transducer G11B)
G01F
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MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVELMETERING BY VOLUME (milk flow sensing devices in milking machines or devices A01J 5/01; measuring or recording blood flow A61B 5/02 , A61B 8/06; metering media to the human body A61M 5/168; burettes or pipettes B01L 3/02; arrangements of liquid volume meters or volume-flow meters in liquid-delivering apparatus, e.g. for retail sale purposes, B67D 5/16; pumps, fluid motors, details common to measuring or metering devices and pumps or fluid motors F01 to F04; locating, determining distance or velocity using reflection or reradiation of radio waves, analogous arrangements using other waves G01S; systems for ratio control G05D 11/00) [2, 5]
G01G
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WEIGHING (sorting by weighing B07C 5/16)
G01H
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MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES (generation of mechanical vibrations without measurement B06B , G10K; measuring position, direction or velocity of an object G01C , G01S; measuring quasi-steady pressure of a fluid G01L 7/00; determining unbalance G01M 1/14; determining properties of material by sonic or ultrasonic waves transmitted therethrough G01N; systems using the reflection or reradiation of acoustic waves, e.g. acoustic imaging, G01S 15/00; seismology, seismic prospecting, acoustic prospecting G01V 1/00; acousto-optical devices per se G02F; obtaining records by techniques analogous to photography using ultrasonic, sonic or infrasonic waves G03B 42/06; speech analysis or synthesis, speech recognition G10L; information storage based on relative movement between record carrier and transducer G11B; piezo-electric, electrostrictive or magnetostrictive elements in general H01L; manufacture of electromechanical resonators by processes which include measurement of frequency with consequential modification of the resonator H03H 3/00) [4]
G01J
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MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHTCOLORIMETRYRADIATION PYROMETRY (light sources F21 , H01J , H01K , H05B; investigating properties of materials by optical means G01N) [2]
G01K
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MEASURING TEMPERATUREMEASURING QUANTITY OF HEATTHERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR (sensing temperature changes for compensating measurements of other variables or for compensating readings of instruments for variations in temperature, see G01D or relevant subclass for variable measured; radiation pyrometry G01J; investigating or analysing materials by use of thermal means G01N 25/00; compound sensitive elements, e.g. bimetallic, G12B 1/02)
G01L
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MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (methods or devices for measuring specially adapted for metal-rolling mills B21B 38/00; sensing pressure changes for compensating measurements of other variables or for compensating readings of instruments for variations in pressure, see G01D or other relevant subclasses for the variable measured; weighing G01G; scanning-probe techniques using atomic force microscopy G01N 13/16; converting a pattern of forces into electrical signals G06K 11/00) [4]
G01M
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TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURESTESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
G01N
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INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (separating components of materials in general B01D , B01J , B03 , B07; apparatus fully provided for in a single other subclass, see the relevant subclass, e.g. B01L; measuring or testing processes other than immunoassay, involving enzymes or micro-organisms C12M , C12Q; investigation of foundation soil in situ E02D 1/00; monitoring or diagnostic devices for exhaust-gas treatment apparatus F01N 11/00; sensing humidity changes for compensating measurements of other variables or for compensating readings of instruments for variations in humidity, see G01D or the relevant subclass for the variable measured; testing or determining the properties of structures G01M; measuring or investigating electric or magnetic properties of materials G01R; systems in general for determining distance, velocity or presence by use of propagation effects, e.g. Doppler effect, propagation time, of reflected or reradiated radio waves, analogous arrangements using other waves G01S; determining sensitivity, graininess, or density of photographic materials G03C 5/02; testing component parts of nuclear reactors G21C 17/00)
G01P
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MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCKINDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT (measuring or recording blood flow A61B 5/02 , A61B 8/06; monitoring speed or deceleration of electrically-propelled vehicles B60L 3/00; vehicle lighting systems adapted to indicate speed B60Q 1/54; determining position or course in navigation, measuring ground distance in geodesy or surveying G01C; combined measuring devices for measuring two or more variables of movement G01C 23/00; measuring velocity of sound G01H; measuring velocity of light G01J 7/00; determining direction or velocity of solid objects by reflection or reradiation of radio or other waves and based on propagation effects, e.g. Doppler effect, propagation time, direction of propagation, G01S; measuring speed of nuclear radiation G01T; measuring acceleration of gravity G01V)
G01R
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MEASURING ELECTRIC VARIABLESMEASURING MAGNETIC VARIABLES (measuring physical variables of any kind by conversion into electric variables, see Note (4) following the title of class G01; measuring diffusion of ions in an electric field, e.g. electrophoresis, electro-osmosis, G01N; investigating non-electric or non-magnetic properties of materials by using electric or magnetic methods G01N; indicating correct tuning of resonant circuits H03J 3/12; monitoring electronic pulse counters H03K 21/40; monitoring operation of communication systems H04)
G01R 1/00
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Details of instruments or arrangements of the types included in groups G01R 5/00 to G01R 13/00 (constructional details particular to arrangements for measuring the electric consumption G01R 11/02) [3]
G01R 3/00
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Apparatus or processes specially adapted for the manufacture of measuring instruments
G01R 5/00
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Instruments for converting a single current or a single voltage into a mechanical displacement (vibration galvanometers G01R 9/02)
G01R 7/00
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Instruments capable of converting two or more currents or voltages into a single mechanical displacement (G01R 9/00 takes precedence)
G01R 9/00
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Instruments employing mechanical resonance
G01R 11/00
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Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption (other arrangements therefor G01R 22/00; monitoring electric consumption of electrically-propelled vehicles B60L 3/00)
G01R 13/00
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Arrangements for displaying electric variables or waveformes (display by mechanical displacement only G01R 5/00 , G01R 7/00 , G01R 9/00; recording frequency spectrum G01R 23/18) [4]
G01R 15/00
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Details of measuring arrangements of the types provided for in groups G01R 17/00 to G01R 29/00 and G01R 33/00 to G01R 35/00 (details of instruments G01R 1/00; measuring leads, measuring probes G01R 1/06; overload protection arrangements G01R 1/36; circuits for correcting the transfer function G01D 3/02)
G01R 17/00
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Measuring arrangements involving comparison with a reference value, e.g. bridge
G01R 19/00
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Arrangements for measuring currents or voltages or for indicating presence or sign thereof (G01R 5/00 takes precedence; for measuring bioelectric currents or voltages A61B 5/04) [4]
G01R 21/00
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Arrangements for measuring electric power or power factor (G01R 7/12 takes precedence) [4]
G01R 22/00
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Arrangements for measuring time integral of electric power or current, e.g. by electronic methods (electromechanical arrangements G01R 11/00; monitoring electric consumption of electrically-propelled vehicles B60L 3/00) [4]
G01R 23/00
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Arrangements for measuring frequenciesArrangements for analysing frequency spectra (frequency discriminators H03D)
G01R 25/00
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Arrangements for measuring phase angle between a voltage and a current or between voltages or currents (measuring power factor G01R 21/00; measuring position of individual pulses in a pulse train G01R 29/02; phase discriminators H03D) [2]
G01R 27/00
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Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
G01R 29/00
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Arrangements for measuring or indicating electric quantities not covered by groups G01R 19/00 to G01R 27/00
G01R 31/00
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Arrangements for testing electric propertiesArrangements for locating electric faultsArrangements for electrical testing characterised by what is being tested not provided for elsewhere (measuring leads, measuring probes G01R 1/06; indicating electrical condition of switchgear or protective devices H01H 71/04 , H01H 73/12 , H02B 11/10 , H02H 3/04; testing or measuring semiconductors or solid state devices during manufacture H01L 21/66; testing line transmission systems H04B 3/46)
G01R 31/01
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Subjecting similar articles in turn to test, e.g. "go/no-go" tests in mass productionTesting objects at points as they pass through a testing station (G01R 31/18 takes precedence) [6]
G01R 31/02
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Testing of electric apparatus, lines, or components for short-circuits, discontinuities, leakage, or incorrect line connection
G01R 31/04
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. . Testing connections, e.g. of plugs, of non-disconnectable joints
G01R 31/06
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. . Testing of electric windings, e.g. for polarity (measuring number of turns, transformation ratio, or coupling factor G01R 29/20)
G01R 31/07
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. . Testing of fuses (means for indicating condition of fuse structurally associated with the fuse H01H 85/30) [6]
G01R 31/08
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Locating faults in cables, transmission lines, or networks (emergency protective circuit arrangements H02H)
G01R 31/10
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. . by increasing destruction at fault, e.g. burning-in by using a pulse generator operating a special programme
G01R 31/11
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. . using pulse-reflection methods
G01R 31/12
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Testing dielectric strength or breakdown voltage
G01R 31/14
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. . Circuits therefor
G01R 31/16
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. . Construction of testing vesselsElectrodes therefor
G01R 31/18
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. . Subjecting similar articles in turn to test, e.g. "go/no-go" tests in mass production
G01R 31/20
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. . Preparation of articles or specimens to facilitate testing
G01R 31/24
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Testing of discharge tubes (during manufacture H01J 9/42) [2]
G01R 31/25
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. . Testing of vacuum tubes [2]
G01R 31/26
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Testing of individual semiconductor devices (measurement of impurity content of materials G01N) [2]
G01R 31/265
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. . Contactless testing [6]
G01R 31/27
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. . Testing of devices without physical removal from the circuit of which they form part, e.g. compensating for effects due to surrounding elements [6]
G01R 31/28
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Testing of electronic circuits, e.g. by signal tracer (testing for short-circuits, discontinuities, leakage or incorrect line connection G01R 31/02; checking computers G06F 11/00; checking static stores for correct operation G11C 29/00)
G01R 31/30
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. . Marginal testing, e.g. by varying supply voltage (marginal testing of computers G06) [2]
G01R 31/302
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. . Contactless testing (non contact-making probes G01R 1/07) [5]
G01R 31/303
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. . . of integrated circuits (G01R 31/305 to G01R 31/315 take precedence) [6]
G01R 31/304
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. . . of printed or hybrid circuits (G01R 31/305 to G01R 31/315 take precedence) [6]
G01R 31/305
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. . . using electron beams [5]
G01R 31/306
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. . . . of printed or hybrid circuits [6]
G01R 31/307
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. . . . of integrated circuits [6]
G01R 31/308
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. . . using non-ionising electromagnetic radiation, e.g. optical radiation [5]
G01R 31/309
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. . . . of printed or hybrid circuits [6]
G01R 31/311
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. . . . of integrated circuits [6]
G01R 31/312
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. . . by capacitive methods [5]
G01R 31/315
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. . . by inductive methods [5]
G01R 31/316
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. . Testing of analog circuits [6]
G01R 31/3161
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. . . Marginal testing [6]
G01R 31/3163
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. . . Functional testing [6]
G01R 31/3167
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. . Testing of combined analog and digital circuits [6]
G01R 31/317
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. . Testing of digital circuits [6]
G01R 31/3173
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. . . Marginal testing [6]
G01R 31/3177
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. . . Testing of logic operation, e.g. by logic analysers [6]
G01R 31/3181
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. . . Functional testing (G01R 31/3177 takes precedence) [6]
G01R 31/3183
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. . . . Generation of test inputs, e.g. test vectors, patterns or sequences [6]
G01R 31/3185
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. . . . Reconfiguring for testing, e.g. LSSD, partitioning [6]
G01R 31/3187
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. . . . Built-in tests [6]
G01R 31/319
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. . . . Tester hardware, i.e. output processing circuits [6]
G01R 31/3193
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. . . . . with comparison between actual response and known fault-free response [6]
G01R 31/327
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Testing of circuit interrupters, switches or circuit-breakers (structural association with switches H01H) [6]
G01R 31/333
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. . Testing of the switching capacity of high-voltage circuit-breakers (means for detecting the presence of an arc or discharge in switching devices H01H 9/50 , H01H 33/26) [6]
G01R 31/34
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Testing dynamo-electric machines (testing electric windings G01R 31/06; methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing dynamo-electric machines H02K 15/00) [3]
G01R 31/36
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Apparatus for testing electrical condition of accumulators or electric batteries, e.g. capacity or charge condition (accumulators combined with arrangements for measuring, testing or indicating condition H01M 10/48; circuit arrangements for charging, or depolarising batteries or for supplying loads from batteries H02J 7/00) [3]
G01R 31/38
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Testing of sparking-plugs (testing non-electrical properties G01M 19/02) [6]
G01R 31/40
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Testing power supplies [6]
G01R 31/42
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. . AC power supplies [6]
G01R 31/44
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Testing lamps (discharge lamps G01R 31/24; structurally associated with light source circuit arrangements for detecting lamp failure H05B 37/03) [6]
G01R 33/00
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Arrangements or instruments for measuring magnetic variables
G01R 35/00
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Testing or calibrating of apparatus covered by the preceding groups [2]
G01S
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RADIO DIRECTION-FINDINGRADIO NAVIGATIONDETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVESLOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVESANALOGOUS ARRANGEMENTS USING OTHER WAVES (detecting masses or objects by methods not involving reflection or reradiation of radio, acoustic or other waves G01V)
G01T
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MEASUREMENT OF NUCLEAR OR X-RADIATION (radiation analysis of materials, mass spectrometry G01N; counters per se G06M , H03K; electric discharge tubes for analysing radiation or particles H01J 40/00 , H01J 47/00 , H01J 49/00)
G01V
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GEOPHYSICSGRAVITATIONAL MEASUREMENTSDETECTING MASSES OR OBJECTSTAGS (detecting or locating foreign bodies for diagnostic, surgical or person-identification purposes A61B; means for indicating the location of accidentally buried, e.g. snow-buried, persons A63B 29/02; investigating or analysing earth materials by determining their chemical or physical properties G01N; measuring electric or magnetic variables in general, other than direction or magnitude of the earth's field G01R; magnetic resonance arrangements in general G01R 33/20) [4, 6]
G01W
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METEOROLOGY (influencing weather conditions A01G 15/00; dispersing fog E01H 13/00; instruments for measuring single variables in general, see the appropriate subclasses of class G01 , e.g. G01K , G01L; radar, sonar, lidar or analogous systems, designed for meteorological use G01S 13/95 , G01S 15/88 , G01S 17/95)
G02
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OPTICS (making optical elements or apparatus B24B , B29D 11/00 , C03 , or other appropriate subclasses or classes; materials per se, see the relevant places, e.g. C03B , C03C)
G03
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PHOTOGRAPHYCINEMATOGRAPHYANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVESELECTROGRAPHYHOLOGRAPHY (reproduction of pictures or patterns by scanning and converting into electrical signals H04N) [4]
G04
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HOROLOGY
G05
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CONTROLLINGREGULATING
G06
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COMPUTINGCALCULATINGCOUNTING (score computers for games A63B 71/06 , A63D 15/20 , A63F 1/18; combinations of writing implements with computing devices B43K 29/08)
G07
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CHECKING-DEVICES
G08
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SIGNALLING (indicating or display devices per se G09F; transmission of pictures H04N)
G09
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EDUCATINGCRYPTOGRAPHYDISPLAYADVERTISINGSEALS
G10
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MUSICAL INSTRUMENTSACOUSTICS
G11
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INFORMATION STORAGE
G12
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INSTRUMENT DETAILS
G21
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NUCLEONICS
G21
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NUCLEAR PHYSICSNUCLEAR ENGINEERING
H
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ELECTRICITY

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