Patents-Review.com
ClassID:

72107 ⎘

B64C27/16 - CPC Classification

Classification description:

Rotorcraft; Rotors peculiar thereto; Helicopters; Rotor drives Drive of rotors by means, e.g. propellers, mounted on rotor blades

Sub-classes:
Recent Application in this class:
#1
20260145778
2026-05-28

Control of Vertical Take Off and Landing Aircraft

 #2
20250242931
2025-07-31

Method and System for Controlling an Aircraft Propulsion System in an Aircraft Susceptible to Ground Resonance

 #3
20240092482
2024-03-21

Method for transmitting power based on aerodynamic deceleration, structure and application thereof

 #4
20240083572
2024-03-14

POWER DEVICE CAPABLE OF GENERATING GREATER PROPELLING FORCE

 #5
20230406551
2023-12-21

Rotary and fixed wing convertible aircraft with monocopters

 #6
20230322372
2023-10-12

Reaction drive helicopter and methods for propulsion and control

 #7
20230322356
2023-10-12

Rotary wing aircraft

 #8
20230192278
2023-06-22

Bearing assembly

 #9
20230056477
2023-02-23

Power device capable of generating greater propelling force

 #10
20220258858
2022-08-18

Rotary wing aircraft with a shrouded tail propeller

 #11
20210300534
2021-09-30

Electric torque arm helicopter with autorotation safety landing system

 #12
20210214075
2021-07-15

Unmanned aerial vehicle

 #13
20210155350
2021-05-27

Float with flaps for air cooling in an aircraft

 #14
20210102553
2021-04-08

Redundant drive orbittally driven electric ducted fan producing torque with lower electric current drawn

 #15
20200407052
2020-12-31

Thrust producing unit with a fail-safe electrical drive unit

 #16
20200301971
2020-09-24

Quadcopter hardware characterization and simulation

 #17
20200290734
2020-09-17

Slewing mechanical power transmissions for rotorcraft

 #18
20200207466
2020-07-02

Automobile engine

 #19
20200130822
2020-04-30

Helicopter using electric propeller torque arm as power source driving main rotor

 #20
20200115062
2020-04-16

Hybrid propulsion system for multi-rotor rotary wing aircraft, comprising improved DC/AC conversion means

 #21
20200055410
2020-02-20

Variable speed rotor with slow rotation mode

 #22
20190154200
2019-05-23

System and method for detecting a lubricant-out condition in an aircraft gearbox

 #23
20190023385
2019-01-24

Electric motor-driven compound aircraft

 #24
20180370624
2018-12-27

Rotary wing VTOL with fixed wing forward flight mode

 #25
20180327088
2018-11-15

Rotating apparatus

 #26
20180178909
2018-06-28

Gearbox casing, a gearbox, and an aircraft

 #27
20180093760
2018-04-05

FLIGHT CONTROL PUMP SYSTEMS

 #28
20170297690
2017-10-19

Hub separation in dual rotor rotary wing aircraft

 #29
20170291702
2017-10-12

Collective to elevator mixing of a rotary wing aircraft

 #30
20170283047
2017-10-05

Main rotor rotational speed control for rotorcraft

 #31
20170275014
2017-09-28

Rotorcraft rotor and propeller speed

 #32
20170274994
2017-09-28

Gearbox for a dual rotor, rotary wing aircraft

 #33
20170274990
2017-09-28

ROTOR HOVER FIGURE OF MERIT FOR ROTARY WING AIRCRAFT

 #34
20170274987
2017-09-28

Single collective stick for a rotary wing aircraft

 #35
20170233068
2017-08-17

Lift offset control of a rotary wing aircraft

 #36
20170233067
2017-08-17

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

 #37
20170217582
2017-08-03

Dual rotor, rotary wing aircraft

 #38
20170210463
2017-07-27

Tip clearance measurement of a rotary wing aircraft

 #39
20170043867
2017-02-16

Spin stabilized aerial aircraft

 #40
20170036761
2017-02-09

Adaptative wind turbine

 #41
20170029100
2017-02-02

POWER DEVICE CAPABLE OF GENERATING GREATER POWER

 #42
20170008622
2017-01-12

Aircraft

 #43
20160208780
2016-07-21

Gyroglider power-generation, control apparatus and method

 #44
20160208779
2016-07-21

Gyroglider power-generation, control apparatus and method

 #45
20150232176
2015-08-20

System and method for avoiding inadvertant entry into an unsafe vertical descent speed region for rotorcraft

 #46
20150158581
2015-06-11

Flying machine

 #47
20110266809
2011-11-03

Gyroglider power-generation, control apparatus and method

 #48
20090127381
2009-05-21

System, method and apparatus for aircraft having counter-rotating, ring-winged rotors

 #49
20090032638
2009-02-05

Helicopter

 #50
19225237
2025-12-23

Reaction drive helicopter with cyclorotor propulsion and control

 #51
18427292
2025-07-29

Method and system for controlling an aircraft propulsion system in an aircraft susceptible to ground resonance

 #52
17132187
2022-04-19

Systems and methods for aircraft lift enhancement

 #53
16696351
2020-06-02

Spring-loaded flaps for air cooling in a wet environment