3842353

Information

• Patent Grant
• 3842353

• References
• Source

• Patent Number

  3,842,353

• Date Filed

  Not available

• Date Issued

  Tuesday, October 15, 1974
  50 years ago

• CPC

  • G01L11/004 - by the use of counterbalancing forces
  • G01H9/00 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means
  • G01L9/0077 - for measuring reflected light
  • G01R17/08 - in which a force or torque representing the measured value is balanced by a force or torque representing the reference value

• US Classifications

  • 324 - Electricity: measuring and testing
  • 073 - Measuring and testing
  • 250 - Radiant energy