3551815

Information

• Patent Grant
• 3551815

• References
• Source

• Patent Number

  3,551,815

• Date Filed

  Not available

• Date Issued

  Tuesday, December 29, 1970
  54 years ago

• CPC

  • H04W88/028 - using pulse address codes

• US Classifications

  • 340 - Communications: electrical
  • 379 - Telephonic communications
  • 455 - Telecommunications