3690014

Information

• Patent Grant
• 3690014

• References
• Source

• Patent Number

  3,690,014

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1972
  52 years ago

• CPC

  • G01C17/14 - by reference marks
  • G01C17/18 - Supporting or suspending compasses

• US Classifications

  • 033 - Geometrical instruments