CPC Subgroup
B64C 27/37 having articulated joints
Full Title
Rotorcraft; Rotors peculiar thereto > Rotors > having articulated joints
3 direct subcodes
Child Classifications
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- B64C 27/39 with individually articulated blades, i.e. with flapping or drag hinges
- B64C 27/41 with flapping hinge or universal joint, common to the blades
- B64C 27/45 with a feathering hinge only
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