1467032

Information

• Patent Grant
• 1467032

• References
• Source

• Patent Number

  1,467,032

• Date Filed

  Not available

• Date Issued

  Tuesday, September 4, 1923
  101 years ago

• CPC

  • G09B15/007 - using disc-shaped boards

• US Classifications

  • 434 - Education and demonstration
  • 033 - Geometrical instruments
  • 084 - Music