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Harald Philipp: Time domain capacitive field detector. David Kiewit, March 24, 1998: US05730165 (633 worldwide citation)

A capacitive field sensor, which may be used for the control of a water supply valve in a basin or fountain, employs a single coupling plate to detect a change in capacitance to ground. The apparatus comprises a circuit for charging a sensing electrode and a switching element acting to remove charge ...


2
Harald Philipp: Capacitive sensor and array. David Kiewit, September 17, 2002: US06452514 (553 worldwide citation)

Proximity of a body, which may be a user's finger, to an electrode pair is sensed by a charge transfer capacitive measurement approach. The electrode pair thus acts as a key that can be arrayed with other electrode pairs to form a keypad, keyboard, linear slider control, or liquid level sensor. ...


3
Harald Philipp: Charge transfer capacitance measurement circuit. David Kiewit, October 15, 2002: US06466036 (434 worldwide citation)

Pulse circuits for measuring the capacitance to ground of a plate may be used in control equipment to provide an indication of the proximity of a person or object to be sensed. Pulse circuits are disclosed that are made from sets of three or more electrical switching elements arranged so that each o ...


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Harald Philipp: Capacitive position sensor. David Kiewit, September 11, 2001: US06288707 (383 worldwide citation)

A multi-electrode capacitive position sensor functions as part of a computer pointing device that can be integrated with the computer's keyboard (


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Harald Philipp: Capacitive position sensor. David Kiewit, March 18, 2003: US06535200 (332 worldwide citation)

A multi-electrode capacitive position sensor functions as part of a computer pointing device that can be integrated with the computer's keyboard and that employs ratiometric capacitive sensing techniques. This approach allows a computer user to move a cursor about on a display by skimming his o ...


6
Harald Philipp: Capacitive closure obstruction sensor. David Kiewit, April 23, 2002: US06377009 (326 worldwide citation)

A system for preventing the pinching or trapping of a human body part or foreign object by a closing panel, which may be a window, door, sunroof, hood or trunk lid, or other closure part of a transport vehicle operates by capacitively sensing the human body part, either before contact with a sensing ...


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Daozheng Lu, Simon W Lu: Identification card verification system. Daozheng Lu, Simon W Lu, David Kiewit, July 11, 1995: US05432864 (254 worldwide citation)

The present invention provides apparatus and method for verifying the identity of a person by comparing that person's face (or selected facial features) with an image generated using data stored on an identification card, badge, tag or other escort memory carried by the person. Both automatic and ma ...


9
Harald Philipp: Adaptive faucet controller measuring proximity and motion. David Kiewit, October 22, 1996: US05566702 (244 worldwide citation)

An electronically controlled automatic faucet has a pulsed infrared beam intersecting the water stream discharged by the faucet. Infrared signals reflected from the water stream are thus detected in addition to any signals reflected from a user's hand(s). A reasonable approximation of the signal rec ...


10
Jorge J Inga, Thomas V Saliga: Automated high definition/resolution image storage, retrieval and transmission system. Automated Medical Access Corporation, David Kiewit, June 14, 1994: US05321520 (199 worldwide citation)

An automated high definition/resolution image storage, retrieval and transmission system for use with medical X-ray film or other documents to provide simultaneous automated access to a common data base by a plurality of remote subscribers upon request, the automated high definition/resolution image ...



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