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IPC Subgroup
B64D 35/08

characterised by the transmission being driven by a plurality of power plants

Introduced: September 1968

Last revised: January 2025

Full Title

Transmitting power from power plants to propellers or rotors; Arrangements of transmissions > characterised by the transmission being driven by a plurality of power plants

Classification Context

Section:
PERFORMING OPERATIONS; TRANSPORTING
Class:
AIRCRAFT; AVIATION; COSMONAUTICS
Subclass:
EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT

Filing statistics

IPC B64D 35/08 belongs to the parent subclass B64D, which recorded 136,419 patent applications worldwide between 2013 and 2023. Annual filings grew from 5,662 in 2013 to 10,944 in 2023 (+93%), peaking at 17,119 applications in 2020. The most active applicants in class B64 are BOEING COMPANY (8,583 applications), AIRBUS OPERATIONS (3,430 applications) and AIRBUS OPERATIONS (2,757 applications).

Source: EPO PATSTAT, worldwide filings

Additional Content

Arrangement of transmissions specially adapted for hybrid-electric power plants

Top Applicants

Top 10 applicants by patent filingsfor 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