2977496

Information

• Patent Grant
• 2977496

• References
• Source

• Patent Number

  2,977,496

• Date Filed

  Not available

• Date Issued

  Tuesday, March 28, 1961
  63 years ago

• CPC

  • H01J21/14 - Tubes with means for concentrating the electron stream
  • H01J2893/0029 - Electron beam tubes

• US Classifications

  • 313 - Electric lamp and discharge devices