1252243

Information

• Patent Grant
• 1252243

• References
• Source

• Patent Number

  1,252,243

• Date Filed

  Not available

• Date Issued

  Tuesday, January 1, 1918
  107 years ago

• CPC

  • B43L7/125 - Comprising at least two straightedges remaining parallel

• US Classifications

  • 033 - Geometrical instruments