1385256

Information

• Patent Grant
• 1385256

• References
• Source

• Patent Number

  1,385,256

• Date Filed

  Not available

• Date Issued

  Tuesday, July 19, 1921
  103 years ago

• CPC

  • G09B13/02 - Dummy practice keyboard apparatus

• US Classifications

  • 434 - Education and demonstration
  • 199 - Type casting
  • 235 - Registers