CPC Main Group
F01C 21/00 Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
12 direct subcodes
Child Classifications
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- F01C 21/02 Arrangements of bearings (bearing constructions F16C)
- F01C 21/04 Lubrication (of machines or engines in general F01M)
- F01C 21/06 Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L)
- F01C 21/08 Rotary pistons (reciprocating pistons in general F16J)
- F01C 21/10 Outer members for co-operation with rotary pistons; Casings (casings for rotary engines or machines in general F16M)
- F01C 21/18 Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
Top Applicants
Top 10 applicants by patent filingsfor 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