1845947

Information

• Patent Grant
• 1845947

• References
• Source

• Patent Number

  1,845,947

• Date Filed

  Not available

• Date Issued

  Tuesday, February 16, 1932
  93 years ago

• CPC

  • G09C1/08 - the connections being mechanical

• US Classifications

  • 380 - Cryptography
  • 400 - Typewriting machines