CPC Subgroup
F03C 1/035 Full Title
Reciprocating-piston liquid engines > with multiple-cylinders, characterised by the number or arrangement of cylinders (with movable cylinders F03C1/22; of flexible-wall type F03C7/00) > with movement in two directions being obtained by two single-acting piston liquid engines, each acting in one direction
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