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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
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)
F21H
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INCANDESCENT MANTLESOTHER INCANDESCENT BODIES HEATED BY COMBUSTION (arrangements thereof F21V 36/00; burners F23D)
F21K
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LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
F21K 2/00
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Light sources using luminescence (luminescent materials C09K 11/00; selection of luminescent materials for light screens F21V 9/16; using excitation by radioactivity G21H 3/02, H01J 65/06, H01J 65/08; transforming the wavelength of the light of gas- or vapour-discharge lamps by luminescence H01J 61/42; electroluminescent light sources H05B 33/00) [2, 7]
F21K 5/00
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Light sources using charges of combustible material, e.g. illuminating flash devices (explosive or thermic compositions C06B; fireworks F42B 4/00; photographic flash units G03B 15/03) [3, 5]
F21K 5/04
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Plural charges, e.g. associated for sequential ignition (F21K 5/06, F21K 5/12 take precedence) [5]
F21K 5/06
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Charge containment [5]
F21K 5/08
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. . Charge held in non-disrupting container, e.g. photo-flash bulb [5]
F21K 5/10
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. . . bearing a coating [5]
F21K 5/12
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Charge ignition [5]
F21K 5/14
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. . percussive [5]
F21K 5/16
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. . electrical (circuit arrangements H05B 43/02) [5]
F21K 5/18
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. . . Electrically-ignited primers [5]
F21K 5/20
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Charge feeding means [5]
F21K 5/22
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Protective light shields [5]
F21K 7/00
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Other light sources
F21L
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LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION [1, 7]
F21S
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NON-PORTABLE LIGHTING DEVICES OR SYSTEMS THEREOF [1, 7]
F21V
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FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOFSTRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR [1, 7]
F21W
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INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS [7]
F21Y
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INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21L, F21S and F21V, RELATING TO THE FORM OF THE LIGHT SOURCES [7]
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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