3720452

Information

• Patent Grant
• 3720452

• References
• Source

• Patent Number

  3,720,452

• Date Filed

  Not available

• Date Issued

  Tuesday, March 13, 1973
  52 years ago

• CPC

  • H01J17/22 - Means for obtaining or maintaining the desired pressure within the tube

• US Classifications

  • 445 - Electric lamp or space discharge component or device manufacturing
  • 313 - Electric lamp and discharge devices