1275890

Information

• Patent Grant
• 1275890

• References
• Source

• Patent Number

  1,275,890

• Date Filed

  Not available

• Date Issued

  Tuesday, August 13, 1918
  106 years ago

• CPC

  • H01J17/32 - Igniting by associated radioactive materials or fillings

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 250 - Radiant energy
  • 252 - Compositions