B64C 27/625 including rotating masses or servo rotors
Introduced: January 1980
Full Title
Full titles differ between systems:
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 > mechanical > including rotating masses or servo rotors
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 > including rotating masses or servo rotors
No child classifications to compare. This is a leaf node in both IPC and CPC.
Top Applicants
Top Applicants (IPC)
Class B64,2013–2023, worldwide · Source: EPO PATSTAT
- BOEING COMPANY US 8,583
- AIRBUS OPERATIONS DE 3,430
- AIRBUS OPERATIONS FR 2,757
- HAMILTON SUNDSTRAND US 2,332
- SZ DJI TECHNOLOGY COMPANY CN 2,109
- AIRBUS OPERATIONS GB 2,084
- GOODRICH CORPORATION US 2,053
- XI'AN AIRCRAFT DESIGN INSTITUTE OF AVIATION INDUSTRY CORPORATION OF CHINA 1,938
- BOEING COMPANY 1,816
- NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS 1,589
Top Applicants (CPC)
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