CPC Main Group
F03C 1/00 Reciprocating-piston liquid engines
9 direct subcodes
Child Classifications
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- F03C 1/007 with single cylinder, double-acting piston
- F03C 1/013 with single cylinder, single-acting piston
- F03C 1/02 with multiple-cylinders, characterised by the number or arrangement of cylinders (with movable cylinders F03C1/22; of flexible-wall type F03C7/00)
- F03C 1/08 Distributing valve-gear peculiar thereto (for engines with positive-displacement in general F01L; )
- F03C 1/22 with movable cylinders
- F03C 1/26 adapted for special use or combined with apparatus driven thereby
Top Applicants
Top 10 applicants by patent filingsfor class F03, 2013–2023, worldwide · Source: EPO PATSTAT
- VESTAS DK 3,718
- WOBBEN PROPERTIES DE 3,602
- SIEMENS GAMESA RENEWABLE ENERGY DK 3,016
- GE (GENERAL ELECTRIC COMPANY) US 2,594
- SIEMENS DE 1,082
- BEIJING GOLDWIND SCIENCE & CREATION WINDPOWER EQUIPMENT COMPANY 709
- LM WIND POWER DK 671
- WOBBEN PROPERTIES 660
- SENVION DE 555
- BEIJING GOLDWIND SCIENCE & CREATION WINDPOWER EQUIPMENT COMPANY CN 536