2529487

Information

• Patent Grant
• 2529487

• References
• Source

• Patent Number

  2,529,487

• Date Filed

  Not available

• Date Issued

  Tuesday, November 14, 1950
  74 years ago

• CPC

  • G09C1/12 - comprising contact-bearing permutation discs

• US Classifications

  • 380 - Cryptography
  • 200 - Electricity: circuit makers and breakers