3671759

Information

• Patent Grant
• 3671759

• References
• Source

• Patent Number

  3,671,759

• Date Filed

  Not available

• Date Issued

  Tuesday, June 20, 1972
  52 years ago

• CPC

  • H04M3/2272 - Subscriber line supervision circuits
  • H03K17/82 - using transfluxors

• US Classifications

  • 379 - Telephonic communications
  • 307 - Electrical transmission or interconnection systems
  • 336 - Inductor devices
  • 365 - Static information storage and retrieval