552914

Information

• Patent Grant
• 552914

• References
• Source

• Patent Number

  552,914

• Date Filed

  Not available

• Date Issued

  Tuesday, January 14, 1896
  128 years ago

• CPC

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

• US Classifications

  • 434 - Education and demonstration
  • 033 - Geometrical instruments