DIFF Subgroup
B64B 1/24 Arrangement of propulsion plant (B64B1/34 takes precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: Arrangement of propulsion plant
CPC: Arrangement of propulsion plant (B64B1/34 takes precedence)
Full Title
Full titles differ between systems:
IPC:
Lighter-than-air aircraft > Rigid airships; Semi-rigid airships > Arrangement of propulsion plant
CPC:
Lighter-than-air aircraft > Rigid airships; Semi-rigid airships (B64B1/58 takes precedence) > Arrangement of propulsion plant (B64B1/34 takes precedence)
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
Child Classifications
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Top Applicants
Top Applicants (IPC)
Class B64,2013–2023, worldwide · Source: EPO PATSTAT
- BOEING COMPANY US 8,583
- AIRBUS OPERATIONS DE 3,430
- AIRBUS OPERATIONS FR 2,757
- HAMILTON SUNDSTRAND US 2,332
- SZ DJI TECHNOLOGY COMPANY CN 2,109
- AIRBUS OPERATIONS GB 2,084
- GOODRICH CORPORATION US 2,053
- XI'AN AIRCRAFT DESIGN INSTITUTE OF AVIATION INDUSTRY CORPORATION OF CHINA 1,938
- BOEING COMPANY 1,816
- NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS 1,589
Top Applicants (CPC)
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