3928926

Information

• Patent Grant
• 3928926

• References
• Source

• Patent Number

  3,928,926

• Date Filed

  Not available

• Date Issued

  Tuesday, December 30, 1975
  49 years ago

• CPC

  • G09B1/24 - the elements being in flexible strip form
  • G09B11/00 - Teaching hand-writing, shorthand, drawing, or painting

• US Classifications

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