CPC Main Group
F04B 1/00 Multi-cylinder machines or pumps characterised by number or arrangement of cylinders (machines or pumps with pistons coacting within one cylinder F04B3/00)
6 direct subcodes
Child Classifications
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- F04B 1/02 having two cylinders (in V-arrangement F04B1/04)
- F04B 1/03 with cylinder axis arranged substantially tangentially to a circle centred on main shaft axis
- F04B 1/04 having cylinders in star- or fan-arrangement
- F04B 1/12 having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B 1/34 Control not provided for in groups F04B1/02, F04B1/03, F04B1/06 or F04B1/26
Top Applicants
Top 10 applicants by patent filingsfor class F04, 2013–2023, worldwide · Source: EPO PATSTAT
- LG ELECTRONICS KR 3,855
- ROBERT BOSCH DE 3,549
- GREE ELECTRIC APPLIANCES 2,273
- GE (GENERAL ELECTRIC COMPANY) US 2,126
- MITSUBISHI ELECTRIC CORPORATION JP 1,881
- UNITED TECHNOLOGIES CORPORATION (UTC) US 1,866
- SAFRAN AIRCRAFT ENGINES FR 1,499
- MITSUBISHI HEAVY INDUSTRIES JP 1,258
- TOYOTA INDUSTRIES CORPORATION JP 1,247
- ATLAS COPCO AIRPOWER BE 1,168