1440878

Information

• Patent Grant
• 1440878

• References
• Source

• Patent Number

  1,440,878

• Date Filed

  Not available

• Date Issued

  Tuesday, January 2, 1923
  102 years ago

• CPC

  • B61L9/02 - non-electric
  • Y10S70/72 - Telephone lock

• US Classifications

  • 362 - Illumination
  • 070 - Locks
  • 246 - Railway switches and signals
  • 315 - Electric lamp and discharge devices: systems