CPC Subgroup
B64C 27/54 Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement
Full Title
Rotorcraft; Rotors peculiar thereto > Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement
Filing statistics
CPC B64C 27/54 belongs to the parent subclass B64C, which recorded 99,021 patent applications worldwide between 2013 and 2023. Annual filings grew from 4,630 in 2013 to 7,634 in 2023 (+65%), peaking at 12,052 applications in 2018. The most active applicants in class B64 are BOEING COMPANY (9,861 applications), AIRBUS OPERATIONS (3,766 applications) and AIRBUS OPERATIONS (3,112 applications).
Source: EPO PATSTAT, worldwide filings
5 direct subcodes
Child Classifications
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- B64C 27/56 characterised by the control initiating means, e.g. manually actuated
- B64C 27/58 Transmitting means, e.g. interrelated with initiating means or means acting on blades (means acting on blades B64C27/72)
- B64C 27/72 Means acting on blades
- B64C 27/78 in association with pitch adjustment of blades of anti-torque rotor
- B64C 27/80 for differential adjustment of blade pitch between two or more lifting rotors
Top Applicants
Top 10 applicants by patent filingsfor class B64, 2013–2023, worldwide · Source: EPO PATSTAT
- BOEING COMPANY US 9,861
- AIRBUS OPERATIONS DE 3,766
- AIRBUS OPERATIONS FR 3,112
- SZ DJI TECHNOLOGY COMPANY CN 2,840
- HAMILTON SUNDSTRAND US 2,753
- GOODRICH CORPORATION US 2,427
- AIRBUS OPERATIONS GB 2,356
- BOEING COMPANY 2,057
- SAFRAN AIRCRAFT ENGINES FR 1,815
- AIRBUS OPERATIONS 1,723