DIFF Main Group
F01C 20/00 Control of, monitoring of, or safety arrangements for, machines or engines
Introduced: January 2006
IPC and CPC are identically structured here. All 8 subcodes exist in both systems.
2 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 2006.
Child Classifications
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- F01C 20/02 specially adapted for several machines or engines connected in series or in parallel since 2006 IPC+CPC Available in IPC and CPC
- F01C 20/04 specially adapted for reversible machines or engines since 2006 IPC+CPC Available in IPC and CPC
- F01C 20/06 specially adapted for stopping, starting, idling or no-load operation since 2006 IPC+CPC Available in IPC and CPC
- F01C 20/08 characterised by varying the rotational speed since 2006 IPC+CPC Available in IPC and CPC
- F01C 20/10 characterised by changing the positions of the inlet or outlet openings with respect to the working chamber since 2006 IPC+CPC Available in IPC and CPC
- F01C 20/18 characterised by varying the volume of the working chamber (by changing the positions of inlet or outlet openings F01C20/10) since 2006 +1 CPC IPC+CPC Available in IPC and CPC
- F01C 20/24 characterised by using valves for controlling pressure or flow rate, e.g. discharge valves (F01C20/10 takes precedence) since 2006 IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
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
Top Applicants (CPC)
Class F01,2013–2023, worldwide · Source: EPO PATSTAT
- GE (GENERAL ELECTRIC COMPANY) US 9,989
- UNITED TECHNOLOGIES CORPORATION (UTC) US 8,110
- SAFRAN AIRCRAFT ENGINES FR 6,248
- HYUNDAI MOTOR COMPANY KR 4,530
- SIEMENS DE 4,461
- FORD GLOBAL TECHNOLOGIES US 4,029
- RAYTHEON TECHNOLOGIES CORPORATION US 3,947
- TOYOTA MOTOR CORPORATION JP 3,734
- GE (GENERAL ELECTRIC COMPANY) 3,415
- SCHAEFFLER TECHNOLOGIES & COMPANY DE 3,063