3131357

Information

• Patent Grant
• 3131357

• References
• Source

• Patent Number

  3,131,357

• Date Filed

  Not available

• Date Issued

  Tuesday, April 28, 1964
  60 years ago

• CPC

  • H03F3/36 - with tubes only

• US Classifications

  • 330 - Amplifiers
  • 324 - Electricity: measuring and testing