1987845

Information

• Patent Grant
• 1987845

• References
• Source

• Patent Number

  1,987,845

• Date Filed

  Not available

• Date Issued

  Tuesday, January 15, 1935
  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
  • 445 - Electric lamp or space discharge component or device manufacturing