2785224

Information

• Patent Grant
• 2785224

• References
• Source

• Patent Number

  2,785,224

• Date Filed

  Not available

• Date Issued

  Tuesday, March 12, 1957
  68 years ago

• CPC

  • G09C1/12 - comprising contact-bearing permutation discs
  • H04L9/0662 - with particular pseudorandom sequence generator

• US Classifications

  • 380 - Cryptography
  • 400 - Typewriting machines