2272844

Information

• Patent Grant
• 2272844

• References
• Source

• Patent Number

  2,272,844

• Date Filed

  Not available

• Date Issued

  Tuesday, February 10, 1942
  83 years ago

• CPC

  • H01J21/12 - Tubes with variable amplification factor
  • H01J2893/0032 - Tubes with variable amplification factor

• US Classifications

  • 330 - Amplifiers
  • 313 - Electric lamp and discharge devices