with multiple-cylinders, characterised by the number or arrangement of cylinders (with movable cylinders F03C1/22; of flexible-wall type F03C7/00)

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)

Filing statistics

CPC F03C 1/02 belongs to the parent subclass F03C, which recorded 3,545 patent applications worldwide between 2013 and 2023. Annual filings declined from 328 in 2013 to 236 in 2023 (-28%), peaking at 441 applications in 2014. The most active applicants in class F03 are VESTAS (3,718 applications), WOBBEN PROPERTIES (3,602 applications) and SIEMENS GAMESA RENEWABLE ENERGY (3,016 applications).

Source: EPO PATSTAT, worldwide filings

3 direct subcodes

Child Classifications

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F03C 1/03 with movement in two directions being obtained by two single-acting piston liquid engines, each acting in one direction
F03C 1/04 with cylinders in star or fan arrangement
F03C 1/06 with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis

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