1946570

Information

• Patent Grant
• 1946570

• References
• Source

• Patent Number

  1,946,570

• Date Filed

  Not available

• Date Issued

  Tuesday, February 13, 1934
  91 years ago

• CPC

  • H01K9/06 - with built-in device

• US Classifications

  • 362 - Illumination
  • 315 - Electric lamp and discharge devices: systems