1445605

Information

• Patent Grant
• 1445605

• References
• Source

• Patent Number

  1,445,605

• Date Filed

  Not available

• Date Issued

  Tuesday, February 13, 1923
  102 years ago

• CPC

  • G09C1/02 - by using a ciphering code in chart form

• US Classifications

  • 283 - Printed matter