3831147

Information

• Patent Grant
• 3831147

• References
• Source

• Patent Number

  3,831,147

• Date Filed

  Not available

• Date Issued

  Tuesday, August 20, 1974
  50 years ago

• CPC

  • H03M11/22 - Static coding
  • A61F4/00 - Methods or devices enabling invalids to operate an apparatus or a device not forming part of the body
  • B41J7/005 - Type-selecting actions or mechanisms by unusual means
  • H03M11/08 - by operating selected combinations of multifunction keys
  • G05B2219/36009 - Keys with variable control code, multifunction keys

• US Classifications

  • 400 - Typewriting machines
  • 340 - Communications: electrical
  • 341 - Coded data generation or conversion