3437825

Information

• Patent Grant
• 3437825

• References
• Source

• Patent Number

  3,437,825

• Date Filed

  Not available

• Date Issued

  Tuesday, April 8, 1969
  55 years ago

• CPC

  • G01C3/12 - with monocular observation at a single point
  • G01C3/00 - Measuring distances in line of sight optical rangefinders

• US Classifications

  • 356 - Optics: measuring and testing
  • 172 - Earth working
  • 250 - Radiant energy