| Patents for G01P 13 - Indicating or recording presence or absence of movement; Indicating or recording of direction of movement (5,618) |
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| 08/21/1979 | US4165505 Apparatus for remotely determining the angular orientation, speed, and/or direction of rotation of objects |
| 07/17/1979 | US4161781 Digital tape rule |
| 07/17/1979 | US4161677 Material flow stoppage detector device |
| 07/17/1979 | US4161118 Force direction transducer |
| 07/03/1979 | CA1057528A1 Directional hot film anemometer transducer |
| 06/19/1979 | US4158306 Wave direction measurement and recording |
| 06/05/1979 | US4157076 Wheel rotation indicator |
| 05/29/1979 | US4156467 Well drilling system |
| 05/15/1979 | CA1054458A1 Mechanical motion sensor |
| 05/08/1979 | US4152933 Wind monitoring assembly and method |
| 04/24/1979 | US4150491 Indicator of true wind direction for sail boats |
| 04/17/1979 | US4150282 Detector for bidirectional movement of an extensible member in an electronic digital scale |
| 03/06/1979 | CA1050152A1 Fluid current meter |
| 02/27/1979 | US4142153 Tachometer for measuring speed and direction of shaft rotation with a single sensing element |
| 02/27/1979 | US4142152 Sensing arrangements |
| 02/20/1979 | US4140919 Apparatus for the surveillance of one or more electrical signals |
| 01/23/1979 | US4135472 Mishandling detector for packages |
| 01/16/1979 | CA1046607A1 Rotary transducer for sensing rotation of different diameter shafts having uniform arcuate surfaces |
| 12/12/1978 | CA1044037A1 Calorimetric flow monitor |
| 12/05/1978 | US4128218 Method of direction finding and direction indication of railbound vehicles |
| 11/28/1978 | US4127778 Optical correlator |
| 11/21/1978 | CA1042782A1 Well flow sensing apparatus |
| 10/31/1978 | CA1041667A1 Signal processor for a shaft encoder |
| 10/17/1978 | US4121088 Electrically heated air data sensing device |
| 09/19/1978 | USRE29765 Strain gauge transducer system |
| 09/19/1978 | US4114560 Flow sensor |
| 09/12/1978 | US4114144 Automatic air-in-line fluid detector |
| 09/12/1978 | US4114063 Piezoelectric sediment particle transport detector |
| 09/12/1978 | US4112756 Ultrasonic air data system |
| 09/12/1978 | CA1038477A1 Apparatus and process for protecting machinery |
| 08/08/1978 | US4105095 Injection lubricating apparatus |
| 08/01/1978 | US4103750 Method of and circuit for forming signals for damping control of an electrical measured-value indicator |
| 07/18/1978 | US4101747 Differential pressure operated switch |
| 07/11/1978 | US4099480 Rotation indicators for cassette reels |
| 07/04/1978 | US4098221 Drum rotation indicator |
| 06/13/1978 | US4095177 Transducer |
| 05/30/1978 | US4091666 Combined housing and standard for water flow meters |
| 05/23/1978 | US4091314 Circuit apparatus for enabling use of an a-c tachometer as the speed signal from a bi-directional d-c machine |
| 05/02/1978 | US4087710 Pulse train disc |
| 05/02/1978 | US4086894 Rotary direction sensor for engine ignition control |
| 04/25/1978 | US4086575 Apparatus for the optional detection of the movement of any individual or any optional pair of objects |
| 04/11/1978 | US4083244 Method and apparatus for measuring fluid flow and/or for exercising a control in dependence thereon |
| 03/28/1978 | US4080925 Portable surface wind indicator |
| 03/28/1978 | US4080826 Apparent wind indication device |
| 03/21/1978 | US4079905 System for providing an indication of wind shear |
| 03/14/1978 | US4079323 Method and apparatus for coupling a moving-object sensor to direction-sensitive data utilization apparatus |
| 03/14/1978 | US4078426 Anemometer |
| 03/14/1978 | US4078425 Wind direction indicator for sailboats |
| 03/07/1978 | US4077266 Device for detecting angular accelerations and decelerations of a vehicle road wheel |
| 02/21/1978 | US4074570 Fluid speed measuring apparatus |
| 02/14/1978 | US4074339 Method and apparatus for measuring the speed of a rotating shaft |
| 02/07/1978 | US4072935 Apparatus for indicating whether one or more objects are in motion |
| 02/07/1978 | US4072934 Method and apparatus for detecting a blockage in a vapor flow line |
| 01/24/1978 | US4070661 Photo electronic direction of motion indicator |
| 12/27/1977 | US4065675 Flow monitoring devices |
| 11/22/1977 | US4059066 Mechanical motion sensor |
| 11/15/1977 | US4058844 Low-mass short-stroke voice-coil actuator for integrated disk file module |
| 11/15/1977 | US4058010 Airport wind shear monitoring method and apparatus |
| 11/01/1977 | US4056001 Air flow measurement |
| 10/18/1977 | US4054779 Counting device |
| 10/11/1977 | US4052957 Burgees |
| 10/11/1977 | US4052894 Velocity vector sensor for low speed airflows |
| 09/27/1977 | US4051397 Two sensitivity level kinetic sensor |
| 09/27/1977 | US4050301 Electromagnetic water current meter with synthetic direction field |
| 09/13/1977 | US4048526 Kinetic sensor employing polymeric piezoelectric material |
| 09/06/1977 | US4046007 Combined lighthouse and wind direction indicator |
| 08/30/1977 | US4045675 Solid state radiation detector system |
| 08/09/1977 | US4041376 Detector for detecting the state of electrically non-conductive or substantially electrically non conductive fluid |
| 08/02/1977 | US4038870 Air movement measuring apparatus |
| 07/19/1977 | US4036065 Grain loss monitor |
| 07/05/1977 | US4034275 Optical control system for elevators |
| 06/28/1977 | US4031759 Method of, and apparatus for, making visible the flow pattern of a gas |
| 06/28/1977 | US4031755 Tri dimensional fluid flow sensing device |
| 06/28/1977 | US4031754 Apparatus for weather prediction |
| 06/07/1977 | US4028689 Calorimetric flow monitor |
| 06/07/1977 | US4028686 Digital detector |
| 06/07/1977 | US4027533 Angle of attack indicating device |
| 05/31/1977 | US4027232 Device for monitoring the travel of a yarn like structure utilizing the frictional electricity involved with said travel |
| 05/24/1977 | US4025934 Method and device for determining a value corresponding to the number of revolutions or the angle of rotation of an axle |
| 05/24/1977 | US4025797 Apparatus for detecting the movement of one or more objects |
| 05/24/1977 | US4024833 Burgees |
| 05/24/1977 | US4024761 Directional hot film anemometer transducer |
| 05/17/1977 | US4024458 Electrical signal generating system |
| 04/05/1977 | US4016432 Variable rate rotary pulse generator |
| 03/15/1977 | US4011752 Adaptive speed and direction analyzer |
| 02/08/1977 | US4007454 Or direction of rotation of objects |
| 01/04/1977 | US4001689 Device for indicating the direction of rotation of a body driven by a rotating electrical machine |
| 12/14/1976 | US3997782 Rotary pulse transducer having stator sealing means |
| 12/14/1976 | US3996795 Ionization flow detector |
| 12/07/1976 | US3995480 Thermal sensor for measurement of ocean current direction |
| 11/23/1976 | US3993983 Apparatus for sensing variations in the heat exchange properties of a medium |
| 11/23/1976 | US3993946 Apparatus for measuring the direction and relative position between a body and a pick-up using a magnetoresistive pick up |
| 11/16/1976 | US3991624 Wind velocity servo system |
| 10/19/1976 | US3986404 Vortex amplifier apparatus |
| 10/19/1976 | US3986395 Velocity measurement instruments |
| 10/05/1976 | US3984685 Wind measurement system |
| 09/14/1976 | US3979980 Apparatus and process for protecting machinery |
| 09/07/1976 | US3978726 Fluid current meter |
| 08/31/1976 | US3978462 Drainage flow detector |
| 08/17/1976 | US3974893 Method and apparatus for sensing and controlling motion of a movable member |