| Patents for G01P 21 - Testing or calibrating of apparatus or devices covered by the other groups of this subclass (4,237) |
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| 01/05/1982 | CA1115844A1 Apparatus for controlling an odometer and speedometer system of a vehicle |
| 09/22/1981 | US4290297 Optically coupled calibrator for transmitters |
| 09/02/1981 | EP0034839A1 Apparatus for monitoring transducers measuring the rotation of a wheel |
| 05/12/1981 | US4266422 Overspeed device test disconnect device |
| 04/21/1981 | US4263578 Belt drive connection malfunction sensor |
| 02/10/1981 | US4249420 Bearing preload assembly for use in an oil filled accelerometer |
| 07/09/1980 | EP0012958A1 Testing device for acceleration sensors |
| 04/22/1980 | US4198990 Mouth mounted accelerometer pack |
| 02/19/1980 | US4188816 Apparatus and method for performing inertial measurements using translational acceleration transducers and for calibrating translational acceleration transducers |
| 01/29/1980 | US4185489 Speedometer tester |
| 12/04/1979 | US4176950 Laser Doppler velocity simulator |
| 09/11/1979 | US4167699 User calibrated electronic speedometer and odometer |
| 08/28/1979 | CA1061132A1 Apparatus for performing inertial measurements using translational acceleration transducers and for calibrating translational acceleration transducers |
| 06/26/1979 | US4158956 Waverider buoy accelerometer calibration testing device |
| 05/15/1979 | US4154395 Redundant signal circuit |
| 03/13/1979 | US4143538 Methods and apparatus for manufacturing tachometers |
| 02/20/1979 | US4140970 Apparatus for controlling an odometer and speedometer system of a vehicle |
| 12/19/1978 | US4130795 Versatile LDV burst simulator |
| 11/14/1978 | US4125894 Engine test and display apparatus |
| 11/14/1978 | CA1042492A1 Calibration and adjustment arrangement for deceleration switch |
| 10/31/1978 | US4122722 Anemometer compensator linearizer |
| 10/24/1978 | CA1041007A1 Methods for dtermining velocities and flow rates of fluids flowing in a well bore |
| 06/06/1978 | US4093836 Acceleration sensitive switch |
| 06/06/1978 | US4092853 Testing rotary movement-electrical signal transducer system, particularly for vehicle wheel anti-block transducer systems |
| 02/14/1978 | US4074196 Speedometer and odometer apparatus |
| 01/31/1978 | US4070908 Anemometer compensator linearizer |
| 01/31/1978 | US4070901 Speedometer and ratio testing apparatus |
| 11/22/1977 | US4059799 Tachometer apparatus |
| 10/11/1977 | US4052882 Testing and calibrating instrument |
| 05/17/1977 | US4023395 System for simulating parameters of a testing device |
| 04/19/1977 | US4018078 Calibration system for magnetic switches used in wrist instruments |
| 03/01/1977 | US4009603 Zero speed calibration method and apparatus for use with an electro-magnetic underwater log for marine vessels |
| 02/22/1977 | US4009447 Amplifier arrangement with zeroing device for piezoelectric transducers |
| 09/28/1976 | US3983480 Calibration circuit and method |
| 05/11/1976 | US3955398 Calibration and adjustment arrangement for deceleration switch |
| 05/04/1976 | US3954006 Methods for determining velocities and flow rates of fluids flowing in well bore |
| 02/10/1976 | US3937080 Electromagnetic apparatus for measuring the flow velocity of an electrically conductive fluid and method of calibration thereof |