3806648

Information

• Patent Grant
• 3806648

• References
• Source

• Patent Number

  3,806,648

• Date Filed

  Not available

• Date Issued

  Tuesday, April 23, 1974
  50 years ago

• CPC

  • H04S7/40 - Visual indication of stereophonic sound image
  • G01R13/208 - Arrangements for measuring with C.R. oscilloscopes
  • G01R13/28 - Circuits for simultaneous or sequential presentation of more than one variable

• US Classifications

  • 381 - Electrical audio signal processing systems and devices
  • 315 - Electric lamp and discharge devices: systems