3818692

Information

• Patent Grant
• 3818692

• References
• Source

• Patent Number

  3,818,692

• Date Filed

  Not available

• Date Issued

  Tuesday, June 25, 1974
  50 years ago

• CPC

  • G04B19/25386 - manually corrected at the end of months having less than 31 days

• US Classifications

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