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IPC Subgroup
G04D 7/1

for hairsprings

Introduced: September 1968

Last revised: January 2006

Full Title

Measuring, counting, calibrating, testing, or regulating apparatus > for hairsprings

Classification Context

Section:
PHYSICS
Class:
HOROLOGY
Subclass:
APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES

Filing statistics

IPC G04D 7/1 belongs to the parent subclass G04D, which recorded 3,191 patent applications worldwide between 2013 and 2023. Annual filings grew from 128 in 2013 to 405 in 2023 (+216%), peaking at 434 applications in 2020. The most active applicants in class G04 are THE SWATCH GROUP RESEARCH AND DEVELOPMENT (1,570 applications), ETA SA MANUFACTURE HORLOGERE SUISSE (1,409 applications) and CASIO COMPUTER COMPANY (1,172 applications).

Source: EPO PATSTAT, worldwide filings

Top Applicants

Top 10 applicants by patent filingsfor class G04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. THE SWATCH GROUP RESEARCH AND DEVELOPMENT CH 1,570
  2. ETA SA MANUFACTURE HORLOGERE SUISSE CH 1,409
  3. CASIO COMPUTER COMPANY 1,172
  4. SEIKO EPSON CORPORATION 1,100
  5. SAMSUNG ELECTRONICS COMPANY KR 768
  6. NIVAROX-FAR CH 750
  7. MONTRES BREGUET CH 707
  8. APPLE US 706
  9. SEIKO EPSON CORPORATION JP 648
  10. CITIZEN WATCH COMPANY 578