1399685

Information

• Patent Grant
• 1399685

• References
• Source

• Patent Number

  1,399,685

• Date Filed

  Not available

• Date Issued

  Tuesday, December 6, 1921
  103 years ago

• CPC

  • B43L7/027 - Plural non-adjustable straightedges fixed at right angles
  • G01C1/00 - Measuring angles
  • G01C17/12 - by sighting means

• US Classifications

  • 033 - Geometrical instruments