3662374

Information

• Patent Grant
• 3662374

• References
• Source

• Patent Number

  3,662,374

• Date Filed

  Not available

• Date Issued

  Tuesday, May 9, 1972
  53 years ago

• CPC

  • G06G7/60 - for living beings
  • G06G7/26 - Arbitrary function generators
  • G09B21/06 - Devices for teaching lip-reading

• US Classifications

  • 345 - Computer graphics processing and selective visual display systems
  • 040 - Card, picture, or sign exhibiting
  • 352 - Optics: motion pictures
  • 446 - Amusement devices: toys