3744309

Information

• Patent Grant
• 3744309

• References
• Source

• Patent Number

  3,744,309

• Date Filed

  Not available

• Date Issued

  Tuesday, July 10, 1973
  51 years ago

• CPC

  • G01C19/44 - for indicating the vertical

• US Classifications

  • 073 - Measuring and testing
  • 244 - Aeronautics and astronautics