3731139

Information

• Patent Grant
• 3731139

• References
• Source

• Patent Number

  3,731,139

• Date Filed

  Not available

• Date Issued

  Tuesday, May 1, 1973
  52 years ago

• CPC

  • H01J5/02 - Vessels Containers Shields associated therewith Vacuum locks
  • H01J19/78 - One or more circuit elements structurally associated with the tube

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 174 - Electricity: conductors and insulators
  • 313 - Electric lamp and discharge devices
  • 330 - Amplifiers