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A
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HUMAN NECESSITIES
B
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PERFORMING OPERATIONSTRANSPORTING
B01
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SEPARATINGMIXING
B01
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PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B02
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CRUSHING, PULVERISING, OR DISINTEGRATINGPREPARATORY TREATMENT OF GRAIN FOR MILLING
B03
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SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGSMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDSSEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS [5]
B04
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CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
B05
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SPRAYING OR ATOMISING IN GENERALAPPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL [2]
B06
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GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
B07
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SEPARATING SOLIDS FROM SOLIDSSORTING
B08
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CLEANING
B09
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DISPOSAL OF SOLID WASTERECLAMATION OF CONTAMINATED SOIL [3, 6]
B21
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SHAPING
B21
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MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIALPUNCHING METAL
B22
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CASTINGPOWDER METALLURGY
B23
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MACHINE TOOLSMETAL-WORKING NOT OTHERWISE PROVIDED FOR
B24
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GRINDINGPOLISHING
B25
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HAND TOOLSPORTABLE POWER-DRIVEN TOOLSHANDLES FOR HAND IMPLEMENTSWORKSHOP EQUIPMENTMANIPULATORS
B26
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HAND CUTTING TOOLSCUTTINGSEVERING
B27
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WORKING OR PRESERVING WOOD OR SIMILAR MATERIALNAILING OR STAPLING MACHINES IN GENERAL
B28
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WORKING CEMENT, CLAY, OR STONE
B29
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WORKING OF PLASTICSWORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B30
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PRESSES
B31
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MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPERWORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
B32
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LAYERED PRODUCTS
B33
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ADDITIVE MANUFACTURING TECHNOLOGY [2015.01]
B41
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PRINTING
B41
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PRINTINGLINING MACHINESTYPEWRITERSSTAMPS [4]
B42
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BOOKBINDINGALBUMSFILESSPECIAL PRINTED MATTER
B43
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WRITING OR DRAWING IMPLEMENTSBUREAU ACCESSORIES
B44
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DECORATIVE ARTS
B60
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TRANSPORTING
B60
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VEHICLES IN GENERAL
B61
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RAILWAYS
B62
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LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
B63
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SHIPS OR OTHER WATERBORNE VESSELSRELATED EQUIPMENT
B64
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AIRCRAFTAVIATIONCOSMONAUTICS
B64B
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LIGHTER-THAN-AIR AIRCRAFT (ground installations for aircraft in general B64F)
B64C
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AEROPLANESHELICOPTERS
B64C 1/00
Aircraft structures or fairings
B64C 1/00
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FuselagesConstructional features common to fuselages, wings, stabilising surfaces or the like [1, 2006.01]
B64C 3/00
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Wings (ornithopter wings B64C 33/02) [1, 2006.01]
B64C 5/00
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Stabilising surfaces [1, 2006.01]
B64C 7/00
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Structures or fairings not otherwise provided for [1, 2006.01]
B64C 9/00

B64C 9/00
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Adjustable control surfaces or members, e.g. rudders (trimming stabilising surfaces B64C 5/10) [1, 2006.01]
B64C 11/00
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Propellers, e.g. of ducted typeFeatures common to propellers and rotors for rotorcraft [1, 2006.01]
B64C 13/00
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Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers [1, 2006.01]
B64C 15/00
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Attitude, flight direction or altitude control by jet reaction [1, 3, 2006.01]
B64C 17/00
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Aircraft stabilisation not otherwise provided for [1, 2006.01]
B64C 19/00
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Aircraft control not otherwise provided for [1, 2006.01]
B64C 21/00
Influencing air flow over aircraft surfaces, not otherwise provided for
B64C 21/00
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Influencing air flow over aircraft surfaces by affecting boundary layer flow [1, 2006.01, 2023.01]
B64C 23/00
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Influencing air flow over aircraft surfaces, not otherwise provided for [1, 2006.01]
B64C 25/00

B64C 25/00
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Alighting gear (air-cushion alighting gear B60V 3/08) [1, 2006.01]
B64C 25/02
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Undercarriages [1, 2006.01]
B64C 25/04
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. . Arrangement or disposition on aircraft [1, 2006.01]
B64C 25/06
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. . fixed [1, 2006.01]
B64C 25/08
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. . non-fixed, e.g. jettisonable [1, 2006.01]
B64C 25/10
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. . . retractable, foldable, or the like [1, 2006.01]
B64C 25/12
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. . . . sideways [1, 2006.01]
B64C 25/14
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. . . . fore-and-aft [1, 2006.01]
B64C 25/16
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. . . . Fairings movable in conjunction with undercarriage elements [1, 2006.01]
B64C 25/18
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. . . . Operating mechanisms [1, 2006.01]
B64C 25/20
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. . . . . mechanical [1, 2006.01]
B64C 25/22
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. . . . . fluid [1, 2006.01]
B64C 25/24
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. . . . . electric [1, 2006.01]
B64C 25/26
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. . . . . Control or locking systems therefor [1, 2006.01]
B64C 25/28
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. . . . . . with indicating or warning devices [1, 2006.01]
B64C 25/30
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. . . . . . emergency actuated [1, 2006.01]
B64C 25/32
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characterised by elements which contact the ground or similar surface  (arrester hooks B64C 25/68) [1, 2006.01]
B64C 25/34
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. . wheeled type, e.g. multi-wheeled bogies [1, 2006.01]
B64C 25/36
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. . . Arrangements or adaptations of wheels, tyres or axles in general [1, 2006.01]
B64C 25/38
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. . endless-track type [1, 2006.01]
B64C 25/40
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. . the elements being rotated before touch-down [1, 2006.01]
B64C 25/42
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. . Arrangement or adaptation of brakes [1, 4, 2006.01]
B64C 25/44
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. . . Actuating mechanisms [1, 2006.01]
B64C 25/46
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. . . . Brake regulators for preventing skidding or aircraft somersaulting [1, 2006.01]
B64C 25/48
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. . . . differentially operated for steering purposes [1, 2006.01]
B64C 25/50
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. . Steerable undercarriagesShimmy-damping [1, 2006.01]
B64C 25/52
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. . Skis or runners [1, 2006.01]
B64C 25/54
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. . Floats [1, 2006.01]
B64C 25/56
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. . . inflatable [1, 2006.01]
B64C 25/58
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. . Arrangements or adaptations of shock-absorbers or springs (shimmy-dampers B64C 25/50) [1, 2006.01]
B64C 25/60
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. . . Oleo legs [1, 2006.01]
B64C 25/62
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. . . Spring shock-absorbersSprings [1, 2006.01]
B64C 25/64
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. . . . using rubber or like elements [1, 2006.01]
B64C 25/66
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. . Convertible alighting gearCombinations of different kinds of ground or like engaging elements [1, 2006.01]
B64C 25/68
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Arrester hooks [1, 2006.01]
B64C 27/00
Aircraft kinds or components not otherwise provided for
B64C 27/00
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RotorcraftRotors peculiar thereto [1, 2006.01]
B64C 29/00
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Aircraft capable of landing or taking-off vertically, e.g. vertical take-off and landing [VTOL] aircraft (rotorcraft B64C 27/00) [1, 2006.01]
B64C 30/00
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Supersonic type aircraft [3, 2006.01]
B64C 31/00
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Aircraft intended to be sustained without power plantPowered hang-glider-type aircraftMicrolight-type aircraft [1, 2006.01]
B64C 33/00
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Ornithopters [1, 2006.01]
B64C 35/00
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Flying-boatsSeaplanes [1, 2006.01]
B64C 37/00
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Convertible aircraft [1, 2006.01]
B64C 39/00
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Aircraft not otherwise provided for [1, 2006.01, 2023.01]
B64C 99/00

B64C 99/00
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Subject matter not provided for in other groups of this subclass [2010.01, 2023.01]
B64D
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EQUIPMENT FOR FITTING IN OR TO AIRCRAFTFLIGHT SUITSPARACHUTESARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
B64F
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GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFTDESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FORHANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
B64G
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COSMONAUTICSVEHICLES OR EQUIPMENT THEREFOR
B64U
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UNMANNED AERIAL VEHICLES [UAV]EQUIPMENT THEREFOR [2023.01]
B65
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CONVEYINGPACKINGSTORINGHANDLING THIN OR FILAMENTARY MATERIAL
B66
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HOISTINGLIFTINGHAULING
B67
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OPENING OR CLOSING BOTTLES, JARS OR SIMILAR CONTAINERSLIQUID HANDLING
B68
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SADDLERYUPHOLSTERY
B81
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MICROSTRUCTURAL TECHNOLOGYNANOTECHNOLOGY
B81
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MICROSTRUCTURAL TECHNOLOGY [7]
B82
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NANOTECHNOLOGY [7]
B99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]
C
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CHEMISTRYMETALLURGY
D
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TEXTILESPAPER
E
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FIXED CONSTRUCTIONS
F
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MECHANICAL ENGINEERINGLIGHTINGHEATINGWEAPONSBLASTING
G
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PHYSICS
H
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ELECTRICITY

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