2180406

Information

• Patent Grant
• 2180406

• References
• Source

• Patent Number

  2,180,406

• Date Filed

  Not available

• Date Issued

  Tuesday, November 21, 1939
  85 years ago

• CPC

  • G01C15/02 - Means for marking measuring points
  • G01C11/32 - Radial triangulation

• US Classifications

  • 033 - Geometrical instruments