3609758

Information

• Patent Grant
• 3609758

• References
• Source

• Patent Number

  3,609,758

• Date Filed

  Not available

• Date Issued

  Tuesday, September 28, 1971
  53 years ago

• CPC

  • H01H13/702 - with contacts carried by or formed from layers in a multilayer structure
  • H01H13/84 - characterised by ergonomic functions
  • H01H2207/01 - from bottom to top layer
  • H01H2207/022 - Plug
  • H01H2209/016 - Protection layer
  • H01H2215/03 - Sound
  • H01H2217/012 - Two keys simultaneous considerations
  • H01H2217/026 - Pencil operated
  • H01H2219/036 - Light emitting elements
  • H01H2221/064 - Limitation of actuating pressure
  • H01H2223/04 - portable hand held
  • H01H2239/026 - Internal encoding

• US Classifications

  • 341 - Coded data generation or conversion
  • 178 - Telegraphy
  • 200 - Electricity: circuit makers and breakers
  • 235 - Registers