CPC Subgroup
B64D 35/06 the propellers or rotors being counter-rotating
Full Title
Transmitting power from power plants to propellers or rotors; Arrangements of transmissions > characterised by the transmission driving a plurality of propellers or rotors > the propellers or rotors being counter-rotating
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