3711645

Information

• Patent Grant
• 3711645

• References
• Source

• Patent Number

  3,711,645

• Date Filed

  Not available

• Date Issued

  Tuesday, January 16, 1973
  52 years ago

• CPC

  • G09C1/14 - involving removable or interchangeable coding numbers

• US Classifications

  • 380 - Cryptography
  • 331 - Oscillators