2424998

Information

• Patent Grant
• 2424998

• References
• Source

• Patent Number

  2,424,998

• Date Filed

  Not available

• Date Issued

  Tuesday, August 5, 1947
  78 years ago

• CPC

  • G09C1/14 - involving removable or interchangeable coding numbers

• US Classifications

  • 380 - Cryptography
  • 340 - Communications: electrical