3519759

Information

• Patent Grant
• 3519759

• References
• Source

• Patent Number

  3,519,759

• Date Filed

  Not available

• Date Issued

  Tuesday, July 7, 1970
  54 years ago

• CPC

  • H04M1/278 - using punched cards or tapes

• US Classifications

  • 379 - Telephonic communications
  • 101 - Printing