1839899

Information

• Patent Grant
• 1839899

• References
• Source

• Patent Number

  1,839,899

• Date Filed

  Not available

• Date Issued

  Tuesday, January 5, 1932
  93 years ago

• CPC

  • H01J17/06 - Cathodes
  • H01J21/02 - Tubes with a single discharge path
  • H01J21/04 - without control means

• US Classifications

  • 313 - Electric lamp and discharge devices