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A
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SECTION A — HUMAN NECESSITIES
B
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SECTION B — PERFORMING OPERATIONSTRANSPORTING
C
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SECTION C — CHEMISTRYMETALLURGY
D
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SECTION D — TEXTILESPAPER
E
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SECTION E — FIXED CONSTRUCTIONS
F
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SECTION F — MECHANICAL ENGINEERINGLIGHTINGHEATINGWEAPONSBLASTING
F01
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ENGINES OR PUMPS
F01
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MACHINES OR ENGINES IN GENERAL (combustion engines F02; machines for liquids F03, F04)ENGINE PLANTS IN GENERALSTEAM ENGINES
F02
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COMBUSTION ENGINES (cyclically operating valves therefor, lubricating, exhausting, or silencing engines F01)HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
F03
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MACHINES OR ENGINES FOR LIQUIDS (for liquids and elastic fluids F01; positive-displacement machines for liquids F04)WIND, SPRING, OR WEIGHT MOTORSPRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
F04
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POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDSPUMPS FOR LIQUIDS OR ELASTIC FLUIDS (portable fire extinguishers with manually-operated pumps A62C 11/00, with power-driven pumps A62C 25/00; charging or scavenging combustion engines by pumps F02B; engine fuel-injection pumps F02M; ion pumps H01J 41/12; electrodynamic pumps H02K 44/02)
F15
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ENGINEERING IN GENERAL
F15
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FLUID-PRESSURE ACTUATORSHYDRAULICS OR PNEUMATICS IN GENERAL
F16
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ENGINEERING ELEMENTS OR UNITSGENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONSTHERMAL INSULATION IN GENERAL
F16B
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DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGESJOINTS OR JOINTING
F16C
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SHAFTSFLEXIBLE SHAFTSELEMENTS OF CRANKSHAFT MECHANISMSROTARY BODIES OTHER THAN GEARING ELEMENTSBEARINGS [5]
F16D
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COUPLINGS FOR TRANSMITTING ROTATIONCLUTCHESBRAKES [2]
F16F
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SPRINGSSHOCK-ABSORBERSMEANS FOR DAMPING VIBRATION
F16G
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BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSESCHAINSFITTINGS PREDOMINANTLY USED THEREFOR
F16H
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GEARING
F16J
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PISTONSCYLINDERSPRESSURE VESSELS IN GENERALSEALINGS
F16K
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VALVESTAPSCOCKSACTUATING-FLOATSDEVICES FOR VENTING OR AERATING
F16L
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PIPESJOINTS OR FITTINGS FOR PIPESSUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBINGMEANS FOR THERMAL INSULATION IN GENERAL
F16M
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FRAMES, CASINGS, OR BEDS, OF ENGINES OR OTHER MACHINES OR APPARATUS, NOT SPECIFIC TO AN ENGINE, MACHINE, OR APPARATUS PROVIDED FOR ELSEWHERESTANDS OR SUPPORTS
F16N
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LUBRICATING
F16P
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SAFETY DEVICES IN GENERAL
F16P 1/00
Devices protecting or preventing injuries to people
F16P 1/00
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Safety devices independent of the control or operation of any machine (protective devices for the eyes or ears, worn on the body or carried in the hand, A61F 9/00, A61F 11/00)
F16P 1/02
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Fixed screens or hoods
F16P 1/04
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Screens or hoods rotating with rotary shafts
F16P 1/06
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specially designed for welding
F16P 3/00
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Safety devices acting in conjunction with the control or operation of a machineControl arrangements requiring the simultaneous use of two or more parts of the body (F16P 5/00 takes precedence)
F16P 5/00

F16P 5/00
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Emergency means for rendering ineffective a coupling conveying reciprocating movement if the motion of the driven part is prematurely resisted
F16P 7/00
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Emergency devices preventing damage to a machine or apparatus (F16P 1/00, F16P 3/00, F16P 5/00 take precedence; indicating means, see the appropriate classes)
F16S
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CONSTRUCTIONAL ELEMENTS IN GENERALSTRUCTURES BUILT-UP FROM SUCH ELEMENTS, IN GENERAL
F16T
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STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
F17
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STORING OR DISTRIBUTING GASES OR LIQUIDS (water supply E03B)
F21
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LIGHTINGHEATING
F21
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LIGHTING (electric aspects or elements, see section H, e.g. electric light sources H01J, H01K, H05B)
F22
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STEAM GENERATION (chemical or physical apparatus for generating gases B01J; chemical generation of gas, e.g. under pressure, Section C; removal of combustion products or residues, e.g. cleaning of the combustion contaminated surfaces of tubes of boilers, F23J; generating combustion products of high pressure or high velocity F23R; water heaters not for steam generation F24H, F28; cleaning of internal or external surfaces of heat-transfer conduits, e.g. water tubes of boilers, F28G)
F23
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COMBUSTION APPARATUSCOMBUSTION PROCESSES
F24
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HEATINGRANGESVENTILATING (protecting plants by heating in gardens, orchards, or forests A01G 13/06; baking ovens and apparatus A21B; cooking devices other than ranges A47J; forging B21J, B21K; specially adapted for vehicles, see the relevant subclasses of classes B60-B64; combustion apparatus in general F23; drying F26B; ovens in general F27; electric heating elements or arrangements H05B)
F25
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REFRIGERATION OR COOLINGCOMBINED HEATING AND REFRIGERATION SYSTEMSHEAT PUMP SYSTEMSMANUFACTURE OR STORAGE OF ICELIQUEFACTION OR SOLIDIFICATION OF GASES
F26
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DRYING
F27
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FURNACESKILNSOVENSRETORTS (specially adapted for a purpose covered by a single other class and specifically mentioned in that class, see the class in question, e.g. bakery ovens A21B, glass melting furnaces C03B, coke or gas-making apparatus C10B, C10J, apparatus for cracking hydrocarbons C10G, blast furnaces C21B, converters for making steel C21C, furnaces for heat treatment of metal C21D; furnaces for electroslag or arc remelting of metals C22B 9/00; enamelling ovens C23D; combustion apparatus F23; electric heating H05B) [4]
F28
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HEAT EXCHANGE IN GENERAL (heat-transfer, heat-exchange or heat-storage materials C09K 5/00; arrangement or mounting of heat-exchangers in air-conditioning, air-humidification or ventilation F24F 13/30)
F41
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WEAPONSBLASTING
F41
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WEAPONS
F42
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AMMUNITIONBLASTING
F99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]
G
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SECTION G — PHYSICS
H
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SECTION H — ELECTRICITY

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