3662538

Information

• Patent Grant
• 3662538

• References
• Source

• Patent Number

  3,662,538

• Date Filed

  Not available

• Date Issued

  Tuesday, May 16, 1972
  52 years ago

• CPC

  • G04F5/022 - Mechanic metronomes
  • G04B21/005 - Periodical acoustic signalling arrangements
  • G04F5/02 - Metronomes

• US Classifications

  • 084 - Music
  • 968 - Horology