1660759

Information

• Patent Grant
• 1660759

• References
• Source

• Patent Number

  1,660,759

• Date Filed

  Not available

• Date Issued

  Tuesday, February 28, 1928
  97 years ago

• CPC

  • H04L15/16 - with keyboard co-operating with code discs

• US Classifications

  • 178 - Telegraphy