2177710

Information

• Patent Grant
• 2177710

• References
• Source

• Patent Number

  2,177,710

• Date Filed

  Not available

• Date Issued

  Tuesday, October 31, 1939
  85 years ago

• CPC

  • H01J61/42 - by transforming the wavelength of the light by luminescence
  • Y10S70/74 - Spring tumbler

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 070 - Locks
  • 362 - Illumination