3431720

Information

• Patent Grant
• 3431720

• References
• Source

• Patent Number

  3,431,720

• Date Filed

  Not available

• Date Issued

  Tuesday, March 11, 1969
  55 years ago

• CPC

  • G04F3/022 - using mechanical signalling device

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 968 - Horology