2557770

Information

• Patent Grant
• 2557770

• References
• Source

• Patent Number

  2,557,770

• Date Filed

  Not available

• Date Issued

  Tuesday, June 19, 1951
  72 years ago

• CPC

  • H03K4/10 - using as active elements vacuum tubes only

• US Classifications

  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems
  • 315 - Electric lamp and discharge devices: systems
  • 331 - Oscillators