119368

Information

• Patent Grant
• 119368

• References
• Source

• Patent Number

  119,368

• Date Filed

  Not available

• Date Issued

  Tuesday, September 26, 1871
  153 years ago

• CPC

  • G09B1/32 - comprising elements to be used without a special support
  • B43L1/02 - Slates

• US Classifications

  • 434 - Education and demonstration