2200021

Information

• Patent Grant
• 2200021

• References
• Source

• Patent Number

  2,200,021

• Date Filed

  Not available

• Date Issued

  Tuesday, May 7, 1940
  84 years ago

• CPC

  • G04C19/02 - by electric lamps

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 040 - Card, picture, or sign exhibiting
  • 116 - Signals and indicators
  • 968 - Horology