1857597

Information

• Patent Grant
• 1857597

• References
• Source

• Patent Number

  1,857,597

• Date Filed

  Not available

• Date Issued

  Tuesday, May 10, 1932
  93 years ago

• CPC

  • G01C17/12 - by sighting means

• US Classifications

  • 346 - Recorders
  • 033 - Geometrical instruments