3505484

Information

• Patent Grant
• 3505484

• References
• Source

• Patent Number

  3,505,484

• Date Filed

  Not available

• Date Issued

  Tuesday, April 7, 1970
  54 years ago

• CPC

  • H04M5/04 - Arrangements for indicating calls or supervising connections for calling or clearing

• US Classifications

  • 379 - Telephonic communications