2247442

Information

• Patent Grant
• 2247442

• References
• Source

• Patent Number

  2,247,442

• Date Filed

  Not available

• Date Issued

  Tuesday, July 1, 1941
  83 years ago

• CPC

  • H03F3/54 - Amplifiers using transit-time effect in tubes or semiconductor devices
  • H03C1/22 - modulating signal applied to same grid
  • H03F1/16 - in discharge tube amplifiers
  • H03F3/52 - with tubes only

• US Classifications

  • 330 - Amplifiers