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PCE
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DIFF Subgroup
B64C 27/22

Compound rotorcraft, i.e. aircraft using in flight the features of both aeroplane and rotorcraft

Introduced: September 1968

Full Title

Rotorcraft; Rotors peculiar thereto > Compound rotorcraft, i.e. aircraft using in flight the features of both aeroplane and rotorcraft

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

Child Classifications

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  • B64C 27/24 with rotor blades fixed in flight to act as lifting surfaces IPC+CPC Available in IPC and CPC
  • B64C 27/26 characterised by provision of fixed wings IPC+CPC Available in IPC and CPC
  • B64C 27/28 with forward-propulsion propellers pivotable to act as lifting rotors IPC+CPC Available in IPC and CPC
  • B64C 27/30 with provision for reducing drag of inoperative rotor IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B64,2013–2023, worldwide · Source: EPO PATSTAT

  1. BOEING COMPANY US 8,583
  2. AIRBUS OPERATIONS DE 3,430
  3. AIRBUS OPERATIONS FR 2,757
  4. HAMILTON SUNDSTRAND US 2,332
  5. SZ DJI TECHNOLOGY COMPANY CN 2,109
  6. AIRBUS OPERATIONS GB 2,084
  7. GOODRICH CORPORATION US 2,053
  8. XI'AN AIRCRAFT DESIGN INSTITUTE OF AVIATION INDUSTRY CORPORATION OF CHINA 1,938
  9. BOEING COMPANY 1,816
  10. NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS 1,589

Top Applicants (CPC)

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