ClassID:

72175

B64C2027/8272 - CPC Classification

Classification description:

Rotorcraft; Rotors peculiar thereto characterised by the provision of an auxiliary rotor or fluid-jet device for counter-balancing lifting rotor torque or changing direction of rotorcraft comprising in addition rudders, tails, fins, or the like comprising fins, or movable rudders

Recent Application in this class:
#1
20260116526
2026-04-30

Rotary-Wing Aircraft Provided with at least one Multi-Plane Pitch Stabilizer

#2
20250289567
2025-09-18

ROTORCRAFT WITH ANTI-TORQUE AIR SYSTEM AND TAIL ROTOR(S)

#3
20240174354
2024-05-30

A ROTORCRAFT WITH A TAIL BOOM AND AN INTEGRAL STABILIZER ARRANGEMENT

#4
20240067332
2024-02-29

Rotary shaft for an aircraft

#5
20240034465
2024-02-01

PROTECTIVE SHROUD FOR AIRCRAFT TAIL ROTOR

#6
20240017824
2024-01-18

Multi-purpose prop-rotor spinner arrangement

#7
20230257112
2023-08-17

Vertical take-off and landing (VTOL) aircraft

#8
20230192284
2023-06-22

MAST DAMPENER FOR A ROTORCRAFT

#9
20230150657
2023-05-18

MANNED AND UNMANNED AIRCRAFT

#10
20230143989
2023-05-11

Flight control system for an aircraft

#11
20230136833
2023-05-04

Rotor blade non-counterbored retention assembly via a sliding clamped bushing

#12
20230097601
2023-03-30

Flight control system for an aircraft

#13
20230041771
2023-02-09

Vertical take-off and landing (VTOL) aircraft

#14
20230024261
2023-01-26

Rotary wing aircraft with a shrouded tail propeller

#15
20230022308
2023-01-26

Helicopter, helicopter kit and associated reconfiguration method

#16
20220185466
2022-06-16

Rotary wing aircraft with an asymmetrical front section

#17
20220185465
2022-06-16

Rotary wing aircraft with an asymmetrical rear section

#18
20220169376
2022-06-02

Rudders for rotorcraft yaw control systems

#19
20220169375
2022-06-02

Tail rotor configurations for rotorcraft yaw control systems

#20
20220169374
2022-06-02

Rotorcraft with cooling anti-torque system

#21
20220144417
2022-05-12

Vertical take off and landing vehicle

#22
20220017214
2022-01-20

Multi-purpose prop-rotor spinner arrangement

#23
20210371131
2021-12-02

Apache helicopter stabilizer bearing replacement kit

#24
20210339852
2021-11-04

Tail rotor gearbox support assemblies for helicopters

#25
20210339851
2021-11-04

Power display for compound aircraft using shared engine torque

#26
20210291969
2021-09-23

Method and a system for reducing the in-flight noise from a hybrid helicopter by managing the angle of incidence of its main rotor and the thrust from each propeller

#27
20200385107
2020-12-10

Low drag sail fairing for coaxial rotor

#28
20200339254
2020-10-29

Rotor systems and methods

#29
20200339252
2020-10-29

ELECTRICALLY-POWERED SWIVELING TAIL ROTOR SYSTEMS

#30
20200298970
2020-09-24

Rotating electric distributed anti-torque fin

#31
20200290734
2020-09-17

Slewing mechanical power transmissions for rotorcraft

#32
20200277049
2020-09-03

Tail rotor gearbox support assemblies for helicopters

#33
20200108919
2020-04-09

Quiet Redundant Rotorcraft

#34
20200102073
2020-04-02

Mast Dampener and Collective Pitch for a Rotocraft

#35
20190326504
2019-10-24

Piezoelectric steering engine of bistable and control method thereof

#36
20190291848
2019-09-26

Vertical stabilizer

#37
20190283868
2019-09-19

Rotor systems and methods

#38
20190193848
2019-06-27

Manned and unmanned aircraft

#39
20190193847
2019-06-27

Manned and unmanned aircraft

#40
20190127059
2019-05-02

Rotorcraft anti-torque system

#41
20190100302
2019-04-04

Counter rotating torque drive for rotary wing vehicle propulsion

#42
20190009885
2019-01-10

Single-shaft aerial vehicle

#43
20190002095
2019-01-03

INDEPENDENT PROPELLER/MAIN ROTOR SPEED CONTROL FOR X2 TECHNOLOGY

#44
20180327079
2018-11-15

Aircraft vertical stabilizer design

#45
20180257771
2018-09-13

Directional control for coaxial rotary wing craft

#46
20180202605
2018-07-19

Deaerating assembly

#47
20180194461
2018-07-12

Stopped rotor aircraft

#48
20170349275
2017-12-07

ELEVATOR AND RUDDER CONTROL OF A ROTORCRAFT

#49
20170341740
2017-11-30

Stopped rotor aircraft

#50
20170315563
2017-11-02

Flight control system for a rotary wing aircraft

#51
20170305544
2017-10-26

TURN RADIUS AND BANK ANGLE FOR ROTARY WING AIRCRAFT

#52
20170305543
2017-10-26

SEALED HUB AND SHAFT FAIRING FOR ROTARY WING AIRCRAFT

#53
20170305540
2017-10-26

Noise modes for rotary wing aircraft

#54
20170305539
2017-10-26

Rotorcraft footprint

#55
20170297690
2017-10-19

Hub separation in dual rotor rotary wing aircraft

#56
20170291702
2017-10-12

Collective to elevator mixing of a rotary wing aircraft

#57
20170291699
2017-10-12

Dual rotor, rotary wing aircraft

#58
20170283047
2017-10-05

Main rotor rotational speed control for rotorcraft

#59
20170275014
2017-09-28

Rotorcraft rotor and propeller speed

#60
20170274994
2017-09-28

Gearbox for a dual rotor, rotary wing aircraft

#61
20170274987
2017-09-28

Single collective stick for a rotary wing aircraft

#62
20170267338
2017-09-21

ACOUSTIC SIGNATURE VARIATION OF AIRCRAFT UTILIZING A CLUTCH

#63
20170233068
2017-08-17

Lift offset control of a rotary wing aircraft

#64
20170233067
2017-08-17

Independent control for upper and lower rotor of a rotary wing aircraft

#65
20170225797
2017-08-10

AIRCRAFT DESIGN FOR AIR TO AIR REFUELING

#66
20170225771
2017-08-10

Plate member for reducing drag on a fairing of an aircraft

#67
20170217582
2017-08-03

Dual rotor, rotary wing aircraft

#68
20170217581
2017-08-03

BLADE INDEXING OF A ROTARY WING AIRCRAFT

#69
20170210463
2017-07-27

Tip clearance measurement of a rotary wing aircraft

#70
20170210461
2017-07-27

Torque and thrust control of a propeller

#71
20170029093
2017-02-02

Elevator load alleviating control for a rotary wing aircraft

#72
20160318605
2016-11-03

Rotor apparatus

#73
20160251080
2016-09-01

Tail assembly for a rotorcraft, rotorcraft and method of manufacture of a strengthened tail assembly

#74
20160144955
2016-05-26

Rotary wing aircraft having a non-ducted tail rotor with at least five blades

#75
20160090176
2016-03-31

Rotorcraft having a stabilizer device

#76
20150367937
2015-12-24

Independent speed and attitude control for a rotary wing aircraft

#77
20150307182
2015-10-29

Advanced pitch stabilizer

#78
20150158584
2015-06-11

Rotary wing aircraft with a tail shroud

#79
20150158580
2015-06-11

Method for controlling rotorcraft airfoil to minimize auxiliary rotor noise and enhance rotorcraft performance

#80
20150142219
2015-05-21

Low speed autogyro yaw control apparatus and method

#81
20150053815
2015-02-26

Automated rotating tail rotor control

#82
20140217231
2014-08-07

Rotary wing aircraft having collocated exhaust duct and propeller shaft

#83
20140070051
2014-03-13

Empennage of a helicopter

#84
20130206897
2013-08-15

Very low-power actuation devices

#85
20130180403
2013-07-18

Deaerating assembly

#86
20120312915
2012-12-13

Low speed autogyro yaw control apparatus and method

#87
20120292433
2012-11-22

Helicopter torque counteraction device

#88
20120187237
2012-07-26

Directional control for a helicopter

#89
20120168556
2012-07-05

Pre-landing, rotor-spin-up apparatus and method

#90
20120104157
2012-05-03

Rotor driven auxiliary power apparatus and method

#91
20120104156
2012-05-03

Use of auxiliary rudders for yaw control at low speed

#92
20120012693
2012-01-19

Method and an aircraft provided with a swiveling tail rotor

#93
20110133022
2011-06-09

Helicopter with counter-rotating coaxial rotors without cyclic variation of pitch, equipped with means for aerodynamic control of attitude and flight path

#94
20100243792
2010-09-30

Method and a device for optimizing the operation of propulsive propellers disposed on either side of a rotorcraft fuselage

#95
20100032517
2010-02-11

Torque counter-action device

#96
20090057480
2009-03-05

Helicopter Tail Assembly

#97
17701472
2024-01-09

Low-drag tail rotor for a compound aircraft

#98
17354707
2023-01-17

Apparatus, system and method for a convertible thruster for a compound aircraft

#99
14618072
2017-04-04

Use of auxiliary rudders for yaw control at low speed