3794766

Information

• Patent Grant
• 3794766

• References
• Source

• Patent Number

  3,794,766

• Date Filed

  Not available

• Date Issued

  Tuesday, February 26, 1974
  50 years ago

• CPC

  • H04M9/08 - Two-way loud-speaking telephone systems with means for suppressing echoes or otherwise conditioning for one or other direction of traffic
  • H04B3/20 - Reducing echo effects or singing Opening or closing transmitting path Conditioning for transmission in one direction or the other
  • H04M9/087 - using different frequency bands for transmitting and receiving paths ; using phase shifting arrangements

• US Classifications

  • 381 - Electrical audio signal processing systems and devices