1111695

Information

• Patent Grant
• 1111695

• References
• Source

• Patent Number

  1,111,695

• Date Filed

  Not available

• Date Issued

  Tuesday, September 22, 1914
  110 years ago

• CPC

  • G09C1/12 - comprising contact-bearing permutation discs

• US Classifications

  • 380 - Cryptography
  • 178 - Telegraphy