3664036

Information

• Patent Grant
• 3664036

• References
• Source

• Patent Number

  3,664,036

• Date Filed

  Not available

• Date Issued

  Tuesday, May 23, 1972
  52 years ago

• CPC

  • G09B13/02 - Dummy practice keyboard apparatus

• US Classifications

  • 434 - Education and demonstration
  • 084 - Music