CPC Subgroup
B64C 27/59 mechanical
Full Title
Rotorcraft; Rotors peculiar thereto > Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement > Transmitting means, e.g. interrelated with initiating means or means acting on blades (means acting on blades B64C27/72) > mechanical
4 direct subcodes
Child Classifications
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- B64C 27/605 including swash plate, spider or cam mechanisms
- B64C 27/615 including flaps mounted on blades
- B64C 27/625 including rotating masses or servo rotors
- B64C 27/635 specially for controlling lag-lead movements of blades
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