3501953

Information

• Patent Grant
• 3501953

• References
• Source

• Patent Number

  3,501,953

• Date Filed

  Not available

• Date Issued

  Tuesday, March 24, 1970
  55 years ago

• CPC

  • H03C3/28 - using variable impedance driven mechanically or acoustically

• US Classifications

  • 073 - Measuring and testing
  • 346 - Recorders