1
Paul S Van Lente, Steven L Geerlings: Vehicle compass with automatic continuous calibration. Prince Corporation, Price Heneveld Cooper DeWitt & Litton, September 4, 1990: US04953305 (332 worldwide citation)

A vehicle compass includes a magnetic field sensor for mounting within a vehicle and providing two output channels of information representing orthogonal direction sensing of the earth's magnetic field within the vehicle. The sensor is coupled to an electrical circuit including a microprocessor for ...


2
Thomas R Olson, James R Geschke, Steven L Geerlings: Vehicle compass system. Prince Corporation, Price Heneveld Cooper DeWitt & Litton, June 2, 1998: US05761094 (330 worldwide citation)

A vehicle compass system having a magnetic field sensor coupled to a processing circuit which samples the sensor data and implements a calibration routine that generates compensation signals to compensate the sensor for the effects of vehicular magnetism so that accurate heading information can be d ...


3
Todd R Witkowski, Kurt A Dykema, Steven L Geerlings, Mark L Zeinstra: Wireless communications system and method. Johnson Controls Technology Company, Foley & Lardner, March 25, 2008: US07349722 (137 worldwide citation)

A system for communicating information facilitates wireless communication between electronic devices. The system includes a transceiver provided in a vehicle. The transceiver communicates with an electronic device located external to the transceiver using a Bluetooth communications standard.


4
Todd R Witkowski, Kurt A Dykema, Steven L Geerlings, Mark L Zeinstra: Wireless communications systems and method. Johnson Controls Technology Company, Foley & Lardner, August 14, 2007: US07257426 (133 worldwide citation)

A wireless communications system and method adapted for use in automotive applications for enabling automatic, high-speed, wireless voice and/or data communications link to be established between a wide variety of external devices and various electronic subsystems of a vehicle. The apparatus include ...


5
Todd R Witkowski, Kurt A Dykema, Steven L Geerlings, Mark L Zeinstra, Robert F Buege: Wireless communications system and method. Johnson Controls Technology Company, Foley & Lardner, March 18, 2008: US07346374 (93 worldwide citation)

A system for communicating information is described. The system comprises a radio frequency (RF) transceiver coupled to a vehicle. The transceiver is configured to communicate with a personal digital assistant (PDA) located external to the transceiver using wireless RF signals to transmit informatio ...


6
Steven L Geerlings: Flux-gate sensor electrical drive method and circuit. Prince Corporation, Price Heneveld Cooper DeWitt & Litton, June 30, 1987: US04677381 (49 worldwide citation)

An electrical drive dircuit for a flux-gate magnetic sensor used in a digital compass for a vehicle provides signals for application to the primary of a flux-gate sensor to assure the core is saturated at a predetermined time during each cycle of the drive signal.


7
Steven L Geerlings: Light control circuit. Prince Corporation, Price Heneveld Cooper DeWitt & Litton, April 19, 1988: US04739224 (37 worldwide citation)

A light control circuit includes a latching circuit actuated by a manually actuated switch to, in turn, activate a solid-state switch coupled to supply power to one or more lamps. The latching circuit is reset by a diode coupled to the door actuated switches such that in the event the interior lamp ...


8
Steven L Geerlings, Mark J Bussis: Vehicle compass correction circuit. Prince Corporation, Price Heneveld Cooper DeWitt & Litton, April 30, 1996: US05511319 (34 worldwide citation)

A compass circuit has a magnetic field sensor adapted to be positioned in a vehicle near a source of varying magnetic fields. A source of correction signals is coupled to the compass circuit for providing correction signals applied to the compass circuit for correcting the heading display of the com ...


9
Michael J Suman, Steven L Geerlings: Vehicle compass circuit. Prince Corporation, Price Heneveld Cooper DeWitt & Litton, September 9, 1997: US05664335 (21 worldwide citation)

A compass circuit has a magnetic field sensor adapted to be positioned in a vehicle near a source of varying magnetic fields. A detector is coupled to the compass circuit for providing a signal applied to the compass circuit which responds for displaying the compass heading prior to the magnetic fie ...


10
Todd R Witkowski, Kurt A Dykema, Steven L Geerlings, Mark L Zeinstra, Robert F Buege: Wireless control system and method. Johnson Controls Technology Company, Foley & Lardner, June 28, 2011: US07970446 (15 worldwide citation)

A wireless control system for use in a vehicle and for use with a remote electronic system is provided. The wireless control system includes a transceiver for mounting in the vehicle. The transceiver is configured to communicate according to a Bluetooth communications standard. The transceiver is fu ...



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