CPC Subgroup Additional Only
F02G 2242/40 Piston-type engines
Full Title
Ericsson-type engines having open regenerative cycles controlled by valves > Piston-type engines
2 direct subcodes
Child Classifications
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- F02G 2242/42 having a single piston regenerative displacer attached to the piston, e.g. "Gifford-McMahon" engines
- F02G 2242/44 having two pistons and reverse flow regenerators
Top Applicants
Top 10 applicants by patent filingsfor class F02, 2013–2023, worldwide · Source: EPO PATSTAT
- ROBERT BOSCH DE 8,801
- FORD GLOBAL TECHNOLOGIES US 8,171
- GE (GENERAL ELECTRIC COMPANY) US 6,957
- HYUNDAI MOTOR COMPANY KR 5,390
- UNITED TECHNOLOGIES CORPORATION (UTC) US 5,250
- TOYOTA MOTOR CORPORATION JP 5,214
- TOYOTA MOTOR CORPORATION 4,149
- DENSO CORPORATION JP 3,400
- KIA MOTORS CORPORATION KR 3,388
- SAFRAN AIRCRAFT ENGINES FR 3,332