3691643

Information

• Patent Grant
• 3691643

• References
• Source

• Patent Number

  3,691,643

• Date Filed

  Not available

• Date Issued

  Tuesday, September 19, 1972
  51 years ago

• CPC

  • G01C19/36 - with north-seeking action by magnetic means
  • F02B2075/025 - two

• US Classifications

  • 033 - Geometrical instruments
  • 701 - Data processing: vehicles, navigation, and relative location