3865467

Information

• Patent Grant
• 3865467

• References
• Source

• Patent Number

  3,865,467

• Date Filed

  Not available

• Date Issued

  Tuesday, February 11, 1975
  49 years ago

• CPC

  • G01V7/14 - using free-fall time

• US Classifications

  • 359 - Optical: systems and elements
  • 073 - Measuring and testing