1801891

Information

• Patent Grant
• 1801891

• References
• Source

• Patent Number

  1,801,891

• Date Filed

  Not available

• Date Issued

  Tuesday, April 21, 1931
  94 years ago

• CPC

  • A63B71/0672 - using non-electronic means
  • A63F11/0051 - Indicators of values
  • A63F2009/0018 - with means for holding a pen or pencil
  • A63F2011/0067 - Score or tally sheets
  • A63F2250/482 - with holes or fingers

• US Classifications

  • 283 - Printed matter