1315406

Information

• Patent Grant
• 1315406

• References
• Source

• Patent Number

  1,315,406

• Date Filed

  Not available

• Date Issued

  Tuesday, September 9, 1919
  105 years ago

• CPC

  • G09C3/06 - the connections being mechanical
  • G07B17/00733 - Cryptography or similar special procedures in a franking system

• US Classifications

  • 380 - Cryptography
  • 400 - Typewriting machines