1992493

Information

• Patent Grant
• 1992493

• References
• Source

• Patent Number

  1,992,493

• Date Filed

  Not available

• Date Issued

  Tuesday, February 26, 1935
  89 years ago

• CPC

  • H01J17/58 - with more than one cathode or anode

• US Classifications

  • 313 - Electric lamp and discharge devices