1971916

Information

• Patent Grant
• 1971916

• References
• Source

• Patent Number

  1,971,916

• Date Filed

  Not available

• Date Issued

  Tuesday, August 28, 1934
  90 years ago

• CPC

  • H01J17/00 - Gas-filled discharge tubes with solid cathode
  • H01J2893/0064 - Tubes with cold main electrodes (including cold cathodes)

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 313 - Electric lamp and discharge devices