2425518

Information

• Patent Grant
• 2425518

• References
• Source

• Patent Number

  2,425,518

• Date Filed

  Not available

• Date Issued

  Tuesday, August 12, 1947
  76 years ago

• CPC

  • G09C3/10 - involving removable or interchangeable coding members

• US Classifications

  • 380 - Cryptography
  • 400 - Typewriting machines