3902093

Information

• Patent Grant
• 3902093

• References
• Source

• Patent Number

  3,902,093

• Date Filed

  Not available

• Date Issued

  Tuesday, August 26, 1975
  49 years ago

• CPC

  • H01J9/08 - Manufacture of heaters for indirectly-heated cathodes
  • H01J29/04 - Cathodes

• US Classifications

  • 313 - Electric lamp and discharge devices