1441902

Information

• Patent Grant
• 1441902

• References
• Source

• Patent Number

  1,441,902

• Date Filed

  Not available

• Date Issued

  Tuesday, January 9, 1923
  102 years ago

• CPC

  • G04C13/065 - controlled by a pendulum or a balance
  • G08B5/38 - using flashing light

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 340 - Communications: electrical
  • 968 - Horology