1998121

Information

• Patent Grant
• 1998121

• References
• Source

• Patent Number

  1,998,121

• Date Filed

  Not available

• Date Issued

  Tuesday, April 16, 1935
  89 years ago

• CPC

  • H01J17/491 - with electrodes arranged side by side and substantially in the same plane
  • 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
  • 362 - Illumination
  • D24 - Medical and laboratory equipment