3185771

Information

• Patent Grant
• 3185771

• References
• Source

• Patent Number

  3,185,771

• Date Filed

  Not available

• Date Issued

  Tuesday, May 25, 1965
  60 years ago

• CPC

  • H04Q3/0008 - using relay selectors in the switching stages
  • H04M3/08 - Indicating faults in circuits or apparatus

• US Classifications

  • 379 - Telephonic communications