3617641

Information

• Patent Grant
• 3617641

• References
• Source

• Patent Number

  3,617,641

• Date Filed

  Not available

• Date Issued

  Tuesday, November 2, 1971
  53 years ago

• CPC

  • H03D1/2227 - using switches for the decoding

• US Classifications

  • 381 - Electrical audio signal processing systems and devices
  • 455 - Telecommunications