3881807

Information

• Patent Grant
• 3881807

• References
• Source

• Patent Number

  3,881,807

• Date Filed

  Not available

• Date Issued

  Tuesday, May 6, 1975
  49 years ago

• CPC

  • H01H36/0066 - magnet being removable
  • G02F1/133308 - LCD panel immediate support structure
  • G02F1/1335 - Structural association of optical devices
  • G04C3/004 - Magnetically controlled
  • G06C7/02 - Keyboards
  • G06C11/02 - with visual indication
  • G06F3/02 - Input arrangements using manually operated switches
  • G06F3/0202 - Constructional details or processes of manufacture of the input device
  • G09G3/18 - using liquid crystals

• US Classifications

  • 708 - Electrical computers: arithmetic processing and calculating
  • 345 - Computer graphics processing and selective visual display systems
  • 349 - Liquid crystal cells, elements and systems