3393764

Information

• Patent Grant
• 3393764

• References
• Source

• Patent Number

  3,393,764

• Date Filed

  Not available

• Date Issued

  Tuesday, July 23, 1968
  56 years ago

• CPC

  • H04R1/227 - using transducers reproducing the same frequency band
  • H04B1/22 - for receivers in which no local oscillation is generated

• US Classifications

  • 381 - Electrical audio signal processing systems and devices
  • 181 - Acoustics