3585311

Information

• Patent Grant
• 3585311

• References
• Source

• Patent Number

  3,585,311

• Date Filed

  Not available

• Date Issued

  Tuesday, June 15, 1971
  53 years ago

• CPC

  • H04M9/087 - using different frequency bands for transmitting and receiving paths ; using phase shifting arrangements
  • H04B3/21 - using a set of bandfilters

• US Classifications

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