ClassID:

72127

B64C27/463 - CPC Classification

Classification description:

Rotorcraft; Rotors peculiar thereto; Rotors; Blades Blade tips

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
20250326481
2025-10-23

Method and System for Inverse-Tapered High-Speed Rotors

#4
20250276789
2025-09-04

ROTORCRAFT AND ROTOR BLADE

#5
20250178721
2025-06-05

TIP END JOINT ARRANGEMENT FOR A ROTOR BLADE WITH RECONFIGURABLE ATTRIBUTES FOR STRUCTURAL AND AERODYNAMIC TUNING

#6
20240336357
2024-10-10

Tip end joint arrangement for a rotor blade with reconfigurable attributes for structural and aerodynamic tuning

#7
20240239512
2024-07-18

ROTORCRAFT WITH A BLADE TIP ILLUMINATION SYSTEM

#8
20240010333
2024-01-11

Rotorcraft with interchangeable rotor diameters

#9
20230054703
2023-02-23

Replacement tip section for a rotor blade and method of replacing a rotor blade tip section

#10
20220266996
2022-08-25

Rotorcraft with interchangeable rotor diameters

#11
20220219815
2022-07-14

Unmanned Aerial Drone Crane

#12
20220194571
2022-06-23

Method of removal and replacement of a tip section of a rotor blade

#13
20220097836
2022-03-31

Vertical take-off and landing aircraft and wing apparatus

#14
20220089278
2022-03-24

BLADE AND ROTOR OF ROTOR CRAFT, AND ROTOR CRAFT

#15
20220073185
2022-03-10

Aircraft wing

#16
20220024569
2022-01-27

Fold-out propeller tip extensions

#17
20210396247
2021-12-23

Tip gap control systems with active blade tips

#18
20210394895
2021-12-23

Passive tip gap management systems for ducted aircraft

#19
20210394888
2021-12-23

Sacrificial blade tips for ducted aircraft

#20
20210387722
2021-12-16

Adjustable ducted rotor blade tip extension

#21
20210362845
2021-11-25

Low-drag blade tip

#22
20210309390
2021-10-07

Method and apparatus for locating and forming fastener holes in a replacement tip section of a rotor blade

#23
20210309350
2021-10-07

Rotor Units Having Asymmetric Rotor Blades

#24
20210276704
2021-09-09

Rotor Units Having Asymmetric Rotor Blades

#25
20210253230
2021-08-19

Rotor for a hover-capable aircraft and related method of control

#26
20210253229
2021-08-19

Rotor for a hover-capable aircraft and related method of control

#27
20210139139
2021-05-13

Bonded skins for ducted-rotor aircraft

#28
20210094681
2021-04-01

Main rotor blade and helicopter

#29
20210078698
2021-03-18

PROPELLER ASSEMBLY, POWER ASSEMBLY, AND AIRCRAFT

#30
20210016876
2021-01-21

Passive rotor alignment in a free-wheeling state

#31
20210009256
2021-01-14

ELLIPTICAL WING TIP AND METHOD OF FABRICATING SAME

#32
20200407076
2020-12-31

Propeller tip warning marker light

#33
20200361600
2020-11-19

Replacement tip section for a rotor blade and method of replacing a rotor blade tip section

#34
20200262551
2020-08-20

Bi-planer rotor blade

#35
20200231276
2020-07-23

Rotor, in particular for aircraft and wind turbines, including device for mechanically breaking up pieces of ice

#36
20200216172
2020-07-09

Rotor units having asymmetric rotor blades

#37
20200173456
2020-06-04

Geared turbofan engine

#38
20200156775
2020-05-21

Variable-pitch ringed rotors for aircraft

#39
20200148343
2020-05-14

Rotor, power assembly and air vehicle

#40
20200047919
2020-02-13

Method and apparatus for locating and forming fastener holes in a replacement tip section of a rotor blade

#41
20200047878
2020-02-13

Method of removal and replacement of a tip section of a rotor blade

#42
20200039640
2020-02-06

Rotor blade for aircraft

#43
20190323818
2019-10-24

Self-calibrating sensor for simultaneous measurement of rub depth and running clearance in a jet engine

#44
20190322354
2019-10-24

LIFTING SURFACES AND ASSOCIATED METHOD

#45
20190315461
2019-10-17

ROTARY-WINGED VEHICLE SYSTEMS AND DEVICES

#46
20190210715
2019-07-11

Wing tip with optimum loading

#47
20190193850
2019-06-27

Rotor for a hover-capable aircraft and related method of control

#48
20190161168
2019-05-30

Redundant Aircraft Propulsion System Using Co-rotating Propellers Joined By Tip Connectors

#49
20190101128
2019-04-04

Wing or blade design for wingtip device, rotor, propeller, turbine, and compressor blades with energy regeneration

#50
20190088244
2019-03-21

Noise reduction device, flight vehicle, power generation device, and noise reduction method

#51
20190031329
2019-01-31

Method of fabricating a rotor blade filler body, and a rotor blade filler body comprising at least one cellular assembly having closed cells

#52
20190031327
2019-01-31

Rotor span-balance pocket

#53
20180346133
2018-12-06

Electrical bus arrangement for ice protection systems

#54
20180304997
2018-10-25

Split winglet

#55
20180304990
2018-10-25

Propeller blade indentations for improved aerodynamic performance and sound control

#56
20180281938
2018-10-04

LOW NOISE ROTOR BLADE DESIGN

#57
20180257768
2018-09-13

Rotor blade tip design for improved hover and cruise performance

#58
20180257767
2018-09-13

Variable sweep rotorcraft blade tip

#59
20180186448
2018-07-05

Rotor units having asymmetric rotor blades

#60
20170291699
2017-10-12

Dual rotor, rotary wing aircraft

#61
20170197708
2017-07-13

Nozzles for a reaction drive blade tip with turning vanes

#62
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

#63
20170174339
2017-06-22

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

#64
20170174323
2017-06-22

Redundant aircraft propulsion system using co-rotating propellers joined by tip connectors

#65
20170174318
2017-06-22

Propeller blade indentations for improved aerodynamic performance and sound control

#66
20170057627
2017-03-02

Metallic dimpled doubler

#67
20170057622
2017-03-02

Wing tip with optimum loading

#68
20160280368
2016-09-29

Layer material for arranging on a rotor blade tip of a helicopter, helicopter light system, and helicopter comprising the same

#69
20160229560
2016-08-11

Spar end cap with drain hole provisions

#70
20160176506
2016-06-23

Lifting surfaces and associated method

#71
20160122011
2016-05-05

AIRFOIL FOR ROTOR BLADE WITH REDUCED PITCHING MOMENT

#72
20160090174
2016-03-31

REACTION DRIVE BLADE TIP WITH TURNING VANES

#73
20160075430
2016-03-17

Variable anhedral tip rotor blade

#74
20150360773
2015-12-17

Helicopter rotor with a mechanical means for configuring rotor tips to control brown outs

#75
20150114945
2015-04-30

Electrical interconnects for ice protection systems

#76
20140341746
2014-11-20

Main rotor blade with composite integral skin and cuff

#77
20140255201
2014-09-11

Removable rotor blade tip

#78
20140154074
2014-06-05

Apparatus, system, and method for pitching and twisting a blade of a rotorcraft

#79
20140056710
2014-02-27

Propeller for ventilator, with a variable chord length

#80
20130224017
2013-08-29

Mission adaptive rotor blade

#81
20130149160
2013-06-13

Airfoil for rotor blade with reduced pitching moment

#82
20130101432
2013-04-25

Erosion resistant helicopter blade

#83
20120251326
2012-10-04

Noise and performance improved rotor blade for a helicopter

#84
20120237354
2012-09-20

Rotor blade tip planform

#85
20110236208
2011-09-29

ROTARY WING BLADE, A ROTARY WING INCLUDING SUCH A BLADE, AND AN AIRCRAFT

#86
20110211968
2011-09-01

Rotor blade for a rotary-wing aircraft

#87
20110171037
2011-07-14

Blade for a turbomachine

#88
20110024552
2011-02-03

Anhedral tip blades for tiltrotor aircraft

#89
20100181432
2010-07-22

Wing tip with optimum loading

#90
20100092299
2010-04-15

Helicopter antitorque tail rotor blade

#91
20100012770
2010-01-21

System and method for improved rotor tip performance

#92
20090269205
2009-10-29

Main rotor blade with integral cuff

#93
20090169381
2009-07-02

Rotor blade for a rotor airplane

#94
20090148303
2009-06-11

Main rotor blade with integral tip section

#95
20090148302
2009-06-11

Main rotor blade with integral tip section

#96
20090148301
2009-06-11

Main rotor blade with removable tip cap

#97
20080003103
2008-01-03

Vortex control for rotor blade devices

#98
20070252031
2007-11-01

Wing tip devices

#99
20070212223
2007-09-13

Rotor blade tip planform

#100
20070020104
2007-01-25

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

#101
20060104812
2006-05-18

Mission replaceable rotor blade tip section

#102
20060049307
2006-03-09

Fluid dynamically effective surface for minimizing induced resistance

#103
20060027703
2006-02-09

System and method for improved rotor tip performance

#104
20050281676
2005-12-22

Multi-hedral rotary wing

#105
20050265850
2005-12-01

Rotor blade for helicopter

#106
20050061921
2005-03-24

Aerodynamic tip protuberances for tip vortex intensity reduction

#107
20050042109
2005-02-24

Braided spar for a rotor blade and method of manufacture thereof

#108
20050013694
2005-01-20

Rotor blade tip section

#109
18638168
2025-10-21

Method and system for inverse-tapered high-speed rotors

#110
18469199
2024-09-17

Offset propeller controlled rotor

#111
17127855
2024-12-10

Anti-phase noise suppression rotor technologies

#112
16222973
2020-11-03

Geometrically reconfigurable propellers

#113
15478080
2018-08-21

Systems and methods for simulating ground effect

#114
15454785
2019-01-15

Reconfiguring propellers during aerial vehicle operation

#115
14975491
2017-05-09

Simulated ground effect for aerial vehicles

#116
14975167
2017-03-14

Geometrically reconfigurable propellers