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CPC Subgroup
B64C 27/56

characterised by the control initiating means, e.g. manually actuated

Full Title

Rotorcraft; Rotors peculiar thereto > Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement > characterised by the control initiating means, e.g. manually actuated

Filing statistics

CPC B64C 27/56 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

1 direct subcode

Child Classifications

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  • B64C 27/57 automatic or condition responsive, e.g. responsive to rotor speed, torque or thrust

Top Applicants

Top 10 applicants by patent filingsfor class B64, 2013–2023, worldwide · Source: EPO PATSTAT

  1. BOEING COMPANY US 9,861
  2. AIRBUS OPERATIONS DE 3,766
  3. AIRBUS OPERATIONS FR 3,112
  4. SZ DJI TECHNOLOGY COMPANY CN 2,840
  5. HAMILTON SUNDSTRAND US 2,753
  6. GOODRICH CORPORATION US 2,427
  7. AIRBUS OPERATIONS GB 2,356
  8. BOEING COMPANY 2,057
  9. SAFRAN AIRCRAFT ENGINES FR 1,815
  10. AIRBUS OPERATIONS 1,723