1531966

Information

• Patent Grant
• 1531966

• References
• Source

• Patent Number

  1,531,966

• Date Filed

  Not available

• Date Issued

  Tuesday, March 31, 1925
  99 years ago

• CPC

  • H01J61/96 - Lamps with light-emitting discharge path and separately-heated incandescent body within a common envelope
  • H01J61/74 - having a main light-emitting filling of difficult vaporisable metal vapour

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 033 - Geometrical instruments