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IPC Main Group
F03B 5/00

Machines or engines characterised by non-bladed rotors, e.g. serrated, using friction

Introduced: September 1968

Last revised: January 2006

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:
MACHINES OR ENGINES FOR LIQUIDS

Filing statistics

IPC F03B 5/00 belongs to the parent subclass F03B, which recorded 51,168 patent applications worldwide between 2013 and 2023. Annual filings grew from 4,168 in 2013 to 4,439 in 2023 (+7%), peaking at 7,453 applications in 2020. 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