3675513

Information

• Patent Grant
• 3675513

• References
• Source

• Patent Number

  3,675,513

• Date Filed

  Not available

• Date Issued

  Tuesday, July 11, 1972
  52 years ago

• CPC

  • H04M11/06 - Simultaneous speech and telegraphic or other data transmission over the same conductors
  • Y10S379/906 - Touchtone message transmission

• US Classifications

  • 379 - Telephonic communications
  • 340 - Communications: electrical
  • 708 - Electrical computers: arithmetic processing and calculating