3156775

Information

• Patent Grant
• 3156775

• References
• Source

• Patent Number

  3,156,775

• Date Filed

  Not available

• Date Issued

  Tuesday, November 10, 1964
  59 years ago

• CPC

  • H04Q1/30 - Signalling arrangements Manipulation of signalling currents
  • H04Q1/4465 - the same frequency being used for all signalling information

• US Classifications

  • 379 - Telephonic communications