2993981

Information

• Patent Grant
• 2993981

• References
• Source

• Patent Number

  2,993,981

• Date Filed

  Not available

• Date Issued

  Tuesday, July 25, 1961
  62 years ago

• CPC

  • H01J9/06 - Machines therefor

• US Classifications

  • 219 - Electric heating
  • 445 - Electric lamp or space discharge component or device manufacturing