2189786

Information

• Patent Grant
• 2189786

• References
• Source

• Patent Number

  2,189,786

• Date Filed

  Not available

• Date Issued

  Tuesday, February 13, 1940
  85 years ago

• CPC

  • H01K11/00 - Lamps having an incandescent body which is not conductively heated
  • Y10S29/044 - Vacuum
  • Y10T29/308 - Using transitory material

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 029 - Metal working
  • 445 - Electric lamp or space discharge component or device manufacturing