ClassID:

72128

B64C27/467 - CPC Classification

Classification description:

Rotorcraft; Rotors peculiar thereto; Rotors; Blades Aerodynamic features

Recent Application in this class:
#1
20260138737
2026-05-21

Rotary Wing Blade of an Aircraft, and Aircraft Provided with such a Blade

#2
20260131887
2026-05-14

AIRCRAFT WITH DUCTED PROPULSION

#3
20260125152
2026-05-07

ROTOR AND ROTORCRAFT

#4
20260103280
2026-04-16

HYBRID AIR VEHICLE

#5
20250376258
2025-12-11

AIR VEHICLE

#6
20250326481
2025-10-23

Method and System for Inverse-Tapered High-Speed Rotors

#7
20250319965
2025-10-16

LOW DRAG AIRFOIL

#8
20250276789
2025-09-04

ROTORCRAFT AND ROTOR BLADE

#9
20250162736
2025-05-22

REDUCED NOISE ROTOR FOR AERIAL VEHICLES

#10
20250019086
2025-01-16

ELECTRIC PROPULSION DEVICE

#11
20250010983
2025-01-09

METHOD OF STABILIZING ARTICULATED ROTOR BLADE

#12
20240383545
2024-11-21

Airfoils and Machines Incorporating Airfoils

#13
20240109652
2024-04-04

BLADE AND ROTOR

#14
20240084705
2024-03-14

Airfoil Superstructure

#15
20240083573
2024-03-14

COMPOUND HELICOPTER

#16
20240067333
2024-02-29

Method of stabilizing articulated rotor blade

#17
20230348042
2023-11-02

Unducted fan having variable pitch blades comprising reduced disturbance platforms

#18
20230322374
2023-10-12

Removable trailing edge assembly and system for rotor blade trailing edge actuation

#19
20230322373
2023-10-12

High speed rotor blade design

#20
20230303241
2023-09-28

Rotor blade using adaptive trailing edge assembly

#21
20230303191
2023-09-28

Airfoils and machines incorporating airfoils

#22
20230278702
2023-09-07

Air vehicle with double-layer rotor wing structure

#23
20230249810
2023-08-10

Low-noise blade for an open rotor

#24
20230242248
2023-08-03

ROTOR BLADE NOZZLE GENERATING AIR PRESSURE SYSTEM

#25
20230122833
2023-04-20

Flight duration enhancement for single rotorcraft and multicopters

#26
20230084519
2023-03-16

AERODYNAMIC OPTIMIZATION OF THE SIZING AND BLADE DESIGNS OF COROTATING COAXIAL ROTORS

#27
20220348270
2022-11-03

Airfoils and machines incorporating airfoils

#28
20220297827
2022-09-22

An Electromagnetically-Actuated Rim Driven Hubless Fan with a Single Stage and Non-Magnetic Bearings

#29
20220219807
2022-07-14

Bistable pitch propeller system with bidirectional propeller rotation

#30
20220201832
2022-06-23

FLOW CONTROL METHOD AND ROTARY WING UNIT

#31
20220126990
2022-04-28

DOUBLE-BLADE TANDEM HELICOPTER

#32
20220111955
2022-04-14

Method for improving the aerodynamic behavior of rotorcraft blades during hovering flight by moving the leading edge of the aerodynamic profiles of these blades

#33
20220089278
2022-03-24

BLADE AND ROTOR OF ROTOR CRAFT, AND ROTOR CRAFT

#34
20220033062
2022-02-03

Method and system for determining helicopter rotor airfoil

#35
20220009623
2022-01-13

Sound-reducing rotor blade tracking wedge profile

#36
20210371095
2021-12-02

Method for constructing a rotor blade intended for a rotorcraft, blade and rotorcraft

#37
20210309350
2021-10-07

Rotor Units Having Asymmetric Rotor Blades

#38
20210276704
2021-09-09

Rotor Units Having Asymmetric Rotor Blades

#39
20210253232
2021-08-19

Hover-capable aircraft

#40
20210237862
2021-08-05

ROTARY-WING AIRCRAFT BLADE AIRFOIL, BLADE HAVING THE BLADE AIRFOIL, AND ROTARY-WING AIRCRAFT INCLUDING THE BLADE

#41
20210237858
2021-08-05

Aircraft generating larger lift by reduction of fluid resistance

#42
20210206482
2021-07-08

Aircraft rotor blade sleeve having a protuberance in its rear zone, and a rotor provided with such a sleeve

#43
20210101677
2021-04-08

Differential blade geometry for rotor assemblies

#44
20210094681
2021-04-01

Main rotor blade and helicopter

#45
20200398971
2020-12-24

Aerial vehicle with rotor blade assembly having rotor blade including vortex generator

#46
20200398908
2020-12-24

Airfoils and machines incorporating airfoils

#47
20200385103
2020-12-10

Bistable pitch propeller system with bidirectional propeller rotation

#48
20200262551
2020-08-20

Bi-planer rotor blade

#49
20200248563
2020-08-06

AIRCRAFT ROTOR BLADE INSERT

#50
20200216172
2020-07-09

Rotor units having asymmetric rotor blades

#51
20200156776
2020-05-21

Updraft assisted rotorcraft take-off

#52
20200148343
2020-05-14

Rotor, power assembly and air vehicle

#53
20200140073
2020-05-07

PASSIVE VARIABLE PITCH PROPELLERS

#54
20200081432
2020-03-12

Aerial vehicle propellers having variable force-torque ratios

#55
20200070966
2020-03-05

Stuck in Detent Monitors for Collective and Cyclic Sticks

#56
20200023953
2020-01-23

Method of determining an initial leading edge circle of airfoils of a blade and of improving the blade in order to increase its negative stall angle of attack

#57
20200017198
2020-01-16

Aircraft generating larger lift by reduction of fluid resistance

#58
20190372404
2019-12-05

Data transmission method, and sending end device

#59
20190315493
2019-10-17

Foreign object damage elimination system

#60
20190300166
2019-10-03

Rotorcraft with counter-rotating rotor blades capable of simultaneously generating upward lift and forward thrust

#61
20190291861
2019-09-26

Rotor blade afterbody

#62
20190233094
2019-08-01

Control system for a stopped rotor aircraft

#63
20190202503
2019-07-04

Airfoils and machines incorporating airfoils

#64
20190193851
2019-06-27

Thick airfoil shapes for blade necks and for blade cuff fairings for an aircraft rotor

#65
20190152594
2019-05-23

Autogyro rotor blade for generating lift by autorotation

#66
20190055012
2019-02-21

Helicopter tail rotor blades and blade assemblies

#67
20190002096
2019-01-03

Method and system for generating a set of values for respective ones of a set of parameters used in determining rotor blade profiles for a coaxial rotor system

#68
20180346133
2018-12-06

Electrical bus arrangement for ice protection systems

#69
20180304997
2018-10-25

Split winglet

#70
20180297692
2018-10-18

REDUCED BLADE VORTEX INTERACTION

#71
20180281938
2018-10-04

LOW NOISE ROTOR BLADE DESIGN

#72
20180194461
2018-07-12

Stopped rotor aircraft

#73
20180186448
2018-07-05

Rotor units having asymmetric rotor blades

#74
20180148160
2018-05-31

Rotor blade having variable twist

#75
20180044038
2018-02-15

Main rotor blade cuff bond fixture

#76
20180029693
2018-02-01

Bistable pitch propeller system with bidirectional propeller rotation

#77
20170355454
2017-12-14

Propeller blade beta twist

#78
20170341743
2017-11-30

Trim tab retention system, an aircraft employing same and a method of retaining a trim tab within a blade housing

#79
20170341740
2017-11-30

Stopped rotor aircraft

#80
20170320564
2017-11-09

Air wheel rotor, a gyro stabilized aircraft and a wind-driven power generator using the air wheel rotor, and a stationary launching device

#81
20170305540
2017-10-26

Noise modes for rotary wing aircraft

#82
20170305539
2017-10-26

Rotorcraft footprint

#83
20170297692
2017-10-19

ROTARY WING AIRCRAFT

#84
20170297690
2017-10-19

Hub separation in dual rotor rotary wing aircraft

#85
20170291702
2017-10-12

Collective to elevator mixing of a rotary wing aircraft

#86
20170291699
2017-10-12

Dual rotor, rotary wing aircraft

#87
20170283047
2017-10-05

Main rotor rotational speed control for rotorcraft

#88
20170275014
2017-09-28

Rotorcraft rotor and propeller speed

#89
20170274994
2017-09-28

Gearbox for a dual rotor, rotary wing aircraft

#90
20170274987
2017-09-28

Single collective stick for a rotary wing aircraft

#91
20170233068
2017-08-17

Lift offset control of a rotary wing aircraft

#92
20170233067
2017-08-17

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

#93
20170217582
2017-08-03

Dual rotor, rotary wing aircraft

#94
20170217575
2017-08-03

Active vibration control of a rotorcraft

#95
20170210463
2017-07-27

Tip clearance measurement of a rotary wing aircraft

#96
20170183089
2017-06-29

Rotor blade system

#97
20170174340
2017-06-22

Aircraft rotor blade of shape adapted for acoustic improvement during approach flights and for improving performance in hovering flight and in forward flight

#98
20170174339
2017-06-22

Aircraft rotor blade of shape adapted for acoustic improvement during an approach flight and for improving performance in forward flight

#99
20170174338
2017-06-22

Propeller surface area treatments for sound dampening

#100
20170158355
2017-06-08

Foreign object damage elimination system

#101
20170129596
2017-05-11

Helicopter aerofoil with trailing edge flap

#102
20170029102
2017-02-02

Methods and systems for rotary wing active flow control

#103
20170009735
2017-01-12

Blade flow deflector

#104
20170001710
2017-01-05

Airfoils for rotor blades of rotary wing aircrafts

#105
20160122011
2016-05-05

AIRFOIL FOR ROTOR BLADE WITH REDUCED PITCHING MOMENT

#106
20160090176
2016-03-31

Rotorcraft having a stabilizer device

#107
20160052627
2016-02-25

Noise reducing profile for helicopter rotor blade tracking wedges

#108
20150114945
2015-04-30

Electrical interconnects for ice protection systems

#109
20150102159
2015-04-16

WATERPROOF MULTI-ROTOR UNMANNED FLYING APPARATUS

#110
20140326826
2014-11-06

Ducted rotor for an aircraft and a rotorcraft

#111
20140312166
2014-10-23

Helicopter and aircraft power device

#112
20140255184
2014-09-11

System and method for reducing rotor blade noise

#113
20140191088
2014-07-10

Aircraft with integrated lift and propulsion system

#114
20130323043
2013-12-05

Rotor blade for a rotor of an aircraft designed to minimize noise emitted by the rotor

#115
20130149160
2013-06-13

Airfoil for rotor blade with reduced pitching moment

#116
20130028748
2013-01-31

Propeller with reactionary and vacuum faces

#117
20120305699
2012-12-06

Front electric rotor helicopter

#118
20120257979
2012-10-11

Flow guiding device with base having recess for adhesive strip or tape

#119
20120251326
2012-10-04

Noise and performance improved rotor blade for a helicopter

#120
20120219417
2012-08-30

Disc rotor retraction system

#121
20110064579
2011-03-17

Active twist hollow beam system

#122
20110036955
2011-02-17

Aircraft with integrated lift and propulsion system

#123
20110010936
2011-01-20

Airfoil for a helicopter rotor blade

#124
20100272576
2010-10-28

High performance outboard section for rotor blades

#125
20100254817
2010-10-07

High performance low noise rotorcraft blade aerodynamic design

#126
20100193644
2010-08-05

Aircraft with integrated lift and propulsion system

#127
20100092294
2010-04-15

Helicopter antitorque tail rotor

#128
20100090067
2010-04-15

Aerodynamic profile with a reversibly deformable contour for aircraft, in particular for rotary wing aircraft

#129
20090230235
2009-09-17

Tambourine helicopter

#130
20090189023
2009-07-30

AERODYNAMIC HIGH-PERFORMANCE PROFILE FOR AIRCRAFT

#131
20090035133
2009-02-05

Delta blade propeller apparatus

#132
20070252047
2007-11-01

Surface flow diverting and static charging ducted pores on wing or blade tip to reduce wake and BVI noise

#133
20070187549
2007-08-16

Airfoil for a helicopter rotor blade

#134
20070158495
2007-07-12

High lift and high strength aerofoil

#135
20070110582
2007-05-17

Rotor blade twist distribution for a high speed rotary-wing aircraft

#136
20070020104
2007-01-25

Rotor blade assembly with high pitching moment airfoil section for a rotary wing aircraft

#137
20060269418
2006-11-30

Rotor blade for a high speed rotary-wing aircraft

#138
20060257261
2006-11-16

Cascade rotor blade for low noise

#139
20060239824
2006-10-26

Proprotor blade with leading edge slot

#140
20060104812
2006-05-18

Mission replaceable rotor blade tip section

#141
20060060720
2006-03-23

Methods and systems for controlling lower surface shocks

#142
20050158175
2005-07-21

Two-sweep rotary wing blade with limited taper ratio

#143
18737892
2026-03-31

Sound-reducing rotor blade tracking wedge profile

#144
18638168
2025-10-21

Method and system for inverse-tapered high-speed rotors

#145
17127855
2024-12-10

Anti-phase noise suppression rotor technologies

#146
15469542
2019-10-08

Vehicle with tension wing assembly

#147
15255098
2018-11-06

Drone noise reduction via simultaneous propeller modulation

#148
15239293
2019-09-17

Propeller design

#149
13853894
2015-12-22

Methods and systems for helicopter rotor blade balancing

#150
13469790
2016-09-13

Apparatus to adjust airfoils of rotor blades