2180047

Information

• Patent Grant
• 2180047

• References
• Source

• Patent Number

  2,180,047

• Date Filed

  Not available

• Date Issued

  Tuesday, November 14, 1939
  85 years ago

• CPC

  • G04C19/02 - by electric lamps

• US Classifications

  • 338 - Electrical resistors
  • 368 - Horology: time measuring systems or devices
  • 968 - Horology