Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
IPC Subgroup
F03C 1/007

with single cylinder, double-acting piston

Introduced: January 1990

Last revised: January 2006

Full Title

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

Classification Context

Section:
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:
MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
Subclass:
POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS

Filing statistics

IPC F03C 1/007 belongs to the parent subclass F03C, which recorded 4,771 patent applications worldwide between 2013 and 2023. Annual filings declined from 503 in 2013 to 378 in 2023 (-25%), peaking at 559 applications in 2014. The most active applicants in class F03 are VESTAS (3,539 applications), WOBBEN PROPERTIES (2,922 applications) and SIEMENS GAMESA RENEWABLE ENERGY (2,747 applications).

Source: EPO PATSTAT, worldwide filings

Top Applicants

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

  1. VESTAS DK 3,539
  2. WOBBEN PROPERTIES DE 2,922
  3. SIEMENS GAMESA RENEWABLE ENERGY DK 2,747
  4. GE (GENERAL ELECTRIC COMPANY) US 2,356
  5. BEIJING GOLDWIND SCIENCE & CREATION WINDPOWER EQUIPMENT COMPANY 1,228
  6. SIEMENS DE 886
  7. SGCC(STATE GRID CORPORATION OF CHINA) 831
  8. HUANENG CLEAN ENERGY RESEARCH INSTITUTE 785
  9. MING YANG SMART ENERGY GROUP. 652
  10. LM WIND POWER DK 600