876948

Information

• Patent Grant
• 876948

• References
• Source

• Patent Number

  876,948

• Date Filed

  Not available

• Date Issued

  Tuesday, January 21, 1908
  117 years ago

• CPC

  • B43L1/00 - Repeatedly-usable boards or tablets for writing or drawing
  • Y10S116/01 - Combined with diverse elements

• US Classifications

  • 434 - Education and demonstration
  • 033 - Geometrical instruments
  • 116 - Signals and indicators