1440993

Information

• Patent Grant
• 1440993

• References
• Source

• Patent Number

  1,440,993

• Date Filed

  Not available

• Date Issued

  Tuesday, January 2, 1923
  102 years ago

• CPC

  • B43L5/002 - with pivoting drawing surface

• US Classifications

  • 108 - Horizontally supported planar surfaces
  • 033 - Geometrical instruments