F01C 1/24 of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions
Introduced: September 1968
Last revised: January 2006
Full Title
Rotary-piston machines or engines > of counter-engagement type, i.e. the movement of co-operating members at the points of engagement being in opposite directions
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- Subclass:
- ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
Filing statistics
IPC F01C 1/24 belongs to the parent subclass F01C, which recorded 7,722 patent applications worldwide between 2013 and 2023. Annual filings declined from 926 in 2013 to 354 in 2023 (-62%), peaking at 960 applications in 2016. The most active applicants in class F01 are GE (GENERAL ELECTRIC COMPANY) (8,496 applications), UNITED TECHNOLOGIES CORPORATION (UTC) (7,291 applications) and SAFRAN AIRCRAFT ENGINES (5,503 applications).
Source: EPO PATSTAT, worldwide filings
2 direct subcodes
Child Classifications
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Top Applicants
Top 10 applicants by patent filingsfor class F01, 2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 8,496
- UNITED TECHNOLOGIES CORPORATION (UTC) US 7,291
- SAFRAN AIRCRAFT ENGINES FR 5,503
- TOYOTA MOTOR CORPORATION 4,556
- SIEMENS DE 3,992
- HYUNDAI MOTOR COMPANY KR 3,929
- RAYTHEON TECHNOLOGIES CORPORATION US 3,534
- FORD GLOBAL TECHNOLOGIES US 3,407
- TOYOTA MOTOR CORPORATION JP 3,042
- WEICHAI POWER COMPANY 2,888