3712047

Information

• Patent Grant
• 3712047

• References
• Source

• Patent Number

  3,712,047

• Date Filed

  Not available

• Date Issued

  Tuesday, January 23, 1973
  51 years ago

• CPC

  • G04G9/0023 - by light valves in general
  • G02F1/133604 - with lamps
  • G02F1/1347 - Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
  • G04C17/0091 - Combined electro-optical and electro-mechanical displays
  • G04G9/0035 - constructional
  • G04G9/0041 - Illumination devices
  • G04G9/0047 - electrical
  • G04G17/02 - Component assemblies
  • G04G19/00 - Electric power supply circuits specially adapted for use in electronic time-pieces

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 349 - Liquid crystal cells, elements and systems
  • 968 - Horology