3720791

Information

• Patent Grant
• 3720791

• References
• Source

• Patent Number

  3,720,791

• Date Filed

  Not available

• Date Issued

  Tuesday, March 13, 1973
  51 years ago

• CPC

  • H04L25/493 - by transition coding
  • H04L5/225 - combined with the use of transition coding

• US Classifications

  • 370 - Multiplex communications
  • 379 - Telephonic communications