3784793

Information

• Patent Grant
• 3784793

• References
• Source

• Patent Number

  3,784,793

• Date Filed

  Not available

• Date Issued

  Tuesday, January 8, 1974
  51 years ago

• CPC

  • H04M1/2765 - implemented by means of portable magnetic cards

• US Classifications

  • 379 - Telephonic communications
  • 235 - Registers