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CPC Subgroup
F03C 1/007

with single cylinder, double-acting piston

Full Title

Reciprocating-piston liquid engines > with single cylinder, double-acting piston

Filing statistics

CPC F03C 1/007 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

1 direct subcode

Child Classifications

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Top Applicants

Top 10 applicants by patent filingsfor class F03, 2013–2023, worldwide · Source: EPO PATSTAT

  1. VESTAS DK 3,718
  2. WOBBEN PROPERTIES DE 3,602
  3. SIEMENS GAMESA RENEWABLE ENERGY DK 3,016
  4. GE (GENERAL ELECTRIC COMPANY) US 2,594
  5. SIEMENS DE 1,082
  6. BEIJING GOLDWIND SCIENCE & CREATION WINDPOWER EQUIPMENT COMPANY 709
  7. LM WIND POWER DK 671
  8. WOBBEN PROPERTIES 660
  9. SENVION DE 555
  10. BEIJING GOLDWIND SCIENCE & CREATION WINDPOWER EQUIPMENT COMPANY CN 536