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DIFF Subgroup
G04B 21/08

Sounding bodies; Whistles; Musical apparatus (with electro-acoustical transmitters G04C21/00, )

Introduced: September 1968

Title

Titles differ between systems:

IPC: Sounding bodies; Whistles; Musical apparatus

CPC: Sounding bodies; Whistles; Musical apparatus (with electro-acoustical transmitters G04C21/00, )

Full Title

Full titles differ between systems:

IPC:

Indicating the time by acoustic means > Regular striking mechanisms giving the full hour, half hour, or quarter hour > Sounding bodies; Whistles; Musical apparatus

CPC:

Indicating the time by acoustic means (at preselected times G04B23/00; by electro-acoustic means G04C21/04; ) > Regular striking mechanisms giving the full hour, half hour or quarter hour > Sounding bodies; Whistles; Musical apparatus (with electro-acoustical transmitters G04C21/00, )

No child classifications to compare. This is a leaf node in both IPC and CPC.

Top Applicants

Top Applicants (IPC)

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

Top Applicants (CPC)

Class G04,2013–2023, worldwide · Source: EPO PATSTAT

  1. THE SWATCH GROUP RESEARCH AND DEVELOPMENT CH 1,705
  2. ETA SA MANUFACTURE HORLOGERE SUISSE CH 1,443
  3. SAMSUNG ELECTRONICS COMPANY KR 1,104
  4. APPLE US 1,038
  5. SEIKO EPSON CORPORATION 875
  6. NIVAROX-FAR CH 781
  7. CASIO COMPUTER COMPANY 734
  8. MONTRES BREGUET CH 715
  9. SEIKO EPSON CORPORATION JP 715
  10. OMEGA CH 555