3428747

Information

• Patent Grant
• 3428747

• References
• Source

• Patent Number

  3,428,747

• Date Filed

  Not available

• Date Issued

  Tuesday, February 18, 1969
  56 years ago

• CPC

  • G06F3/0235 - using chord techniques
  • B41J5/08 - Character or syllable selected by means of keys or keyboards of the typewriter type
  • B41J5/28 - Multiple-action keys
  • H01H13/84 - characterised by ergonomic functions
  • H03M11/02 - Details
  • H03M11/08 - by operating selected combinations of multifunction keys
  • H03M11/22 - Static coding
  • H04L17/02 - Apparatus or circuits at the transmitting end

• US Classifications

  • 178 - Telegraphy
  • 341 - Coded data generation or conversion
  • 400 - Typewriting machines