3820391

Information

• Patent Grant
• 3820391

• References
• Source

• Patent Number

  3,820,391

• Date Filed

  Not available

• Date Issued

  Friday, June 28, 1974
  50 years ago

• CPC

  • G01L9/0032 - using photoelectric means
  • G01C13/008 - measuring depth of open water
  • G01K1/024 - for remote indication
  • G01K1/045 - temperature indication combined with the indication of another variable

• US Classifications

  • 073 - Measuring and testing
  • 374 - Thermal measuring and testing