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A
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SECTION A — HUMAN NECESSITIES
B
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SECTION B — 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 LIQUIDS OR OTHER 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 PAPER ARTICLESWORKING PAPER
B32
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LAYERED PRODUCTS
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 (air-cushion vehicles B60V)
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 (aerodynamical features common to fuselages, wings, stabilising surfaces, or the like B64C 23/00; flight-deck installations B64D)
B64C 3/00
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Wings (stabilising surfaces B64C 5/00; ornithopter wings B64C 33/02)
B64C 5/00
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Stabilising surfaces (attaching stabilising surfaces to fuselage B64C 1/26)
B64C 7/00
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Structures or fairings not otherwise provided for
B64C 9/00

B64C 9/00
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Adjustable control surfaces or members, e.g. rudders (trimming stabilising surfaces B64C 5/10; systems for actuating flying-control surfaces B64C 13/00)
B64C 11/00
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Propellers, e.g. of ducted typeFeatures common to propellers and rotors for rotorcraft (rotors specially adapted for rotorcraft B64C 27/32)
B64C 13/00
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Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers
B64C 15/00
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Attitude, flight direction, or altitude control by jet reaction (details of jet-engine plants, e.g. of nozzles or jet pipes, F02K) [3]
B64C 17/00
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Aircraft stabilisation not otherwise provided for
B64C 19/00
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Aircraft control not otherwise provided for
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 (boundary-layer control in general F15D)
B64C 23/00
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Influencing air-flow over aircraft surfaces, not otherwise provided for
B64C 25/00

B64C 25/00
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Alighting gear (air-cushion alighting gear B60V 3/08)
B64C 27/00
Aircraft kinds or components not otherwise provided for
B64C 27/00
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RotorcraftRotors peculiar thereto (alighting gear B64C 25/00)
B64C 27/02
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Gyroplanes
B64C 27/04
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Helicopters
B64C 27/06
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. . with single rotor
B64C 27/08
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. . with two or more rotors
B64C 27/10
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. . . arranged coaxially
B64C 27/12
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. . Rotor drives
B64C 27/14
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. . . Direct drive between power plant and rotor hub
B64C 27/16
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. . . Drive of rotors by means, e.g. propellers, mounted on rotor blades
B64C 27/18
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. . . . the means being jet-reaction apparatus
B64C 27/20
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Rotorcraft characterised by having shrouded rotors, e.g. flying platforms
B64C 27/22
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Compound rotorcraft, i.e. aircraft using in flight the features of both aeroplane and rotorcraft
B64C 27/24
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. . with rotor blades fixed in flight to act as lifting surfaces
B64C 27/26
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. . characterised by provision of fixed wings
B64C 27/28
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. . with forward-propulsion propellers pivotable to act as lifting rotors
B64C 27/30
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. . with provision for reducing drag of inoperative rotor
B64C 27/32
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Rotors (features common to rotors and propellers B64C 11/00)
B64C 27/33
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. . having flexing arms [3]
B64C 27/35
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. . having elastomeric joints [3]
B64C 27/37
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. . having articulated joints (B64C 27/33, B64C 27/35 take precedence) [3]
B64C 27/39
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. . . with individually articulated blades, i.e. with flapping or drag hinges [3]
B64C 27/41
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. . . with flapping hinge or universal joint, common to the blades [3]
B64C 27/43
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. . . . see-saw type, i.e. two-bladed rotor [3]
B64C 27/45
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. . . with a feathering hinge only [3]
B64C 27/46
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. . Blades
B64C 27/467
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. . . Aerodynamic features [6]
B64C 27/473
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. . . Constructional features [6]
B64C 27/48
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. . . . Root attachment to rotor head
B64C 27/50
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. . . . Blades foldable to facilitate stowage of aircraft
B64C 27/51
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Damping of blade movements [3]
B64C 27/52
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Tilting of rotor bodily relative to fuselage (of see-saw type construction B64C 27/43)
B64C 27/54
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Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement
B64C 27/56
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. . characterised by the control initiating means, e.g. manually actuated (B64C 27/58 takes precedence)
B64C 27/57
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. . . automatic or condition responsive, e.g. responsive to rotor speed, torque or thrust [3]
B64C 27/58
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. . Transmitting means, e.g. interrelated with initiating means or means acting on blades (initiating means B64C 27/56; means acting on blades B64C 27/72)
B64C 27/59
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. . . mechanical [3]
B64C 27/605
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. . . . including swash plate, spider or cam mechanisms [3]
B64C 27/615
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. . . . including flaps mounted on blades [3]
B64C 27/625
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. . . . including rotating masses or servo rotors [3]
B64C 27/635
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. . . . specially for controlling lag-lead movements of blades [3]
B64C 27/64
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. . . using fluid pressure, e.g. having fluid power amplification [3]
B64C 27/68
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. . . using electrical energy, e.g. having electrical power amplification [3]
B64C 27/72
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. . Means acting on blades
B64C 27/78
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. . in association with pitch adjustment of blades of anti-torque rotor
B64C 27/80
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. . for differential adjustment of blade pitch between two or more lifting rotors
B64C 27/82
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characterised by the provision of an auxiliary rotor or fluid-jet device for counter-balancing lifting-rotor torque or changing direction of rotorcraft
B64C 29/00
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Aircraft capable of landing or taking-off vertically (attitude, flight direction, or altitude control by jet reaction B64C 15/00; rotorcraft B64C 27/00; air-cushion vehicles B60V; details of jet-engine plants, e.g. of nozzles or jet pipes, F02K)
B64C 30/00
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Supersonic type aircraft [3]
B64C 31/00
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Aircraft intended to be sustained without power plantPowered hang-glider-type aircraftMicrolight-type aircraft
B64C 33/00
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Ornithopters
B64C 35/00
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Flying-boatsSeaplanes (alighting gear B64C 25/00)
B64C 37/00
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Convertible aircraft (vehicles capable of travelling in or on different media B60F)
B64C 39/00
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Aircraft not otherwise provided for
B64C 99/00

B64C 99/00
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Subject matter not provided for in other groups of this subclass [2010.01]
B64D
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EQUIPMENT FOR FITTING IN OR TO AIRCRAFTFLYING SUITSPARACHUTESARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS
B64F
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GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS
B64G
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COSMONAUTICSVEHICLES OR EQUIPMENT THEREFOR (apparatus for, or methods of, winning materials from extraterrestrial sources E21C 51/00)
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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MICRO-STRUCTURAL TECHNOLOGYNANO-TECHNOLOGY
B81
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MICRO-STRUCTURAL TECHNOLOGY [7]
B82
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NANO-TECHNOLOGY [7]
B99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]
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
G
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SECTION G — PHYSICS
H
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SECTION H — ELECTRICITY

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