Patents-Review.com
ClassID:

72121 ⎘

B64C27/37 - CPC Classification

Classification description:

Rotorcraft; Rotors peculiar thereto; Rotors having articulated joints

Sub-classes:
Recent Application in this class:
#1
20250010982
2025-01-09

Inner member for main rotor centrifugal force bearing

 #2
20240425176
2024-12-26

CONTROL DEVICE AND SYSTEM FOR ROTOR BLADES

 #3
20230151845
2023-05-18

Adjustable crank arm

 #4
20230067093
2023-03-02

Chord lock assembly for a tiltrotor aircraft

 #5
20230056974
2023-02-23

Stowable lift rotors for VTOL aircraft

 #6
20220194573
2022-06-23

Thrusters for Multi-Copter Yaw Control and Forward Flight

 #7
20210403149
2021-12-30

Rotor system with reconfigurable duct

 #8
20210325885
2021-10-21

Methods for maintaining difficult-to-access structures using unmanned aerial vehicles

 #9
20210253231
2021-08-19

Propeller assemblies, aircraft including the same, and associated methods

 #10
20210214076
2021-07-15

Flexured standpipes for aircraft propulsion assemblies

 #11
20200407056
2020-12-31

Rotor blade control system

 #12
20200391847
2020-12-17

Pitch-change apparatus and method of pitching rotor blades

 #13
20200361599
2020-11-19

Dual flex-beam assembly for folding rotor blade

 #14
20200269965
2020-08-27

Foldable unmanned aerial vehicle

 #15
20200223537
2020-07-16

TANDEM TILTROTOR AIRCRAFT

 #16
20200166938
2020-05-28

Methods for maintaining difficult-to-access structures using unmanned aerial vehicles

 #17
20200164957
2020-05-28

UNMANNED AERIAL VEHICLE

 #18
20200148353
2020-05-14

Unmanned aerial vehicle

 #19
20200010192
2020-01-09

Vertical take-off and landing aircraft with variable impelled air vectored thrust apertures

 #20
20190248492
2019-08-15

DRONE

 #21
20190185169
2019-06-20

UNMANNED AERIAL VEHICLE

 #22
20190152593
2019-05-23

Aerodyne with vertical-takeoff-and-landing ability

 #23
20190106210
2019-04-11

UNMANNED AERIAL VEHICLES WITH TILTING PROPELLERS, AND ASSOCIATED SYSTEMS AND METHODS

 #24
20190055016
2019-02-21

Hybrid powered unmanned aircraft system

 #25
20190039727
2019-02-07

Rotorcraft centrifugal force bearing

 #26
20180362154
2018-12-20

Retractable and deployable flight rotor system

 #27
20180305006
2018-10-25

PITCH BEARING ASSEMBLY FOR ROTOR SYSTEM AND AIRCRAFT

 #28
20180281933
2018-10-04

Double Folding Drone Arms with Landing Gear

 #29
20180257767
2018-09-13

Variable sweep rotorcraft blade tip

 #30
20180257766
2018-09-13

Rotor assembly apparatus

 #31
20180237139
2018-08-23

UAV arm mechanism and UAV

 #32
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

 #33
20170081024
2017-03-23

Lead-lag dampers and assemblies for an articulated rotor and methods for operation

 #34
20160167778
2016-06-16

Unmanned flying device

 #35
20160167777
2016-06-16

Rotor assembly apparatus

 #36
20160159472
2016-06-09

Reconfigurable unmanned aircraft system

 #37
20160152329
2016-06-02

Folding proprotor gimbal lock and blade lock mechanism

 #38
20160090176
2016-03-31

Rotorcraft having a stabilizer device

 #39
20160031556
2016-02-04

Impact resistant propeller system, fast response electric propulsion system and lightweight vertical take-off and landing aircraft using same

 #40
20150175259
2015-06-25

Rotor hub for a rotorcraft

 #41
20150125300
2015-05-07

ROTOR HUB FOR A ROTORCRAFT

 #42
20150053814
2015-02-26

Rotor system with torque-splitter assembly

 #43
20140377067
2014-12-25

Rotor system of a rotary wing aircraft

 #44
20140274427
2014-09-18

Multilink constant velocity joint

 #45
20140263855
2014-09-18

Spindle mounted tiltrotor pylon with fixed engine arrangement

 #46
20140147277
2014-05-29

ROTOR BLADE SYSTEM FOR HELICOPTER

 #47
20140133979
2014-05-15

Constant velocity joint with control mechanism

 #48
20130078100
2013-03-28

Low offset hingeless rotor with pitch change bearings

 #49
20130004311
2013-01-03

Rotor hub for use with high-inertia blades

 #50
20120219422
2012-08-30

Rotor blade coupling device and rotor head

 #51
20090269200
2009-10-29

Rotor hub systems and methods