3000486

Information

• Patent Grant
• 3000486

• References
• Source

• Patent Number

  3,000,486

• Date Filed

  Not available

• Date Issued

  Tuesday, September 19, 1961
  62 years ago

• CPC

  • G09C3/06 - the connections being mechanical

• US Classifications

  • 380 - Cryptography
  • 400 - Typewriting machines