2917579

Information

• Patent Grant
• 2917579

• References
• Source

• Patent Number

  2,917,579

• Date Filed

  Not available

• Date Issued

  Tuesday, December 15, 1959
  65 years ago

• CPC

  • G09C1/12 - comprising contact-bearing permutation discs

• US Classifications

  • 380 - Cryptography
  • 341 - Coded data generation or conversion