3364604

Information

• Patent Grant
• 3364604

• References
• Source

• Patent Number

  3,364,604

• Date Filed

  Not available

• Date Issued

  Tuesday, January 23, 1968
  57 years ago

• CPC

  • G09B5/02 - with visual presentation of the material to be studied
  • G09F11/295 - Electric control therefor

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 434 - Education and demonstration