3673787

Information

• Patent Grant
• 3673787

• References
• Source

• Patent Number

  3,673,787

• Date Filed

  Not available

• Date Issued

  Tuesday, July 4, 1972
  52 years ago

• CPC

  • G04C19/00 - Producing optical time signals at prefixed times by electric means
  • G04B19/34 - Position of the hands projected optically
  • G04C15/00 - Clocks driven by synchronous motors

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 353 - Optics: image projectors
  • 968 - Horology