3500001

Information

• Patent Grant
• 3500001

• References
• Source

• Patent Number

  3,500,001

• Date Filed

  Not available

• Date Issued

  Tuesday, March 10, 1970
  54 years ago

• CPC

  • H04M3/08 - Indicating faults in circuits or apparatus
  • H04Q1/22 - Automatic arrangements
  • H04Q3/0012 - in which the relays are arranged in a matrix configuration

• US Classifications

  • 379 - Telephonic communications