Chief designer of a new RFID card reader that cost about one half the reader it replaced.  Developed a very low power radio frequency identification (RFID) card reading system.  The system was used as a replacement to hotel room door lock keys.  Received US patent #6,476,708.
 

Helped develop a complete video interactive archery/firearm shooting range system.  System projected moving targets onto a fabric screen using a computer, laser disk player and video projector. Reflector tipped arrows and an infrared CCD camera determined where the arrows hit the target. Also developed a similar shooting range system that used infrared laser equipped pistols, rifles and shotguns. Systems launched laser light pulses at screen targets instead of arrows. 500+ installations now installed and operating. Wrote detailed descriptions for a patent application on the techniques used. Received US patent #5,566,951.
 

Conducted research and designed circuits to detect, count and size air bubbles in blood using ultrasound techniques. Bubbles with volumes less than 1 nanoliter were detectable. Circuit used in a kidney dialysis machine. Designed and built a portable battery powered bubble monitor used by the company's sales force to show potential buyers the bubble-free nature of the disposable dialysis machine tubing sets. Wrote circuit descriptions for a patent application on the bubble detector system.  Received US patent #5,394,732, Japan patent #2823513 and European patent..
 

Developed a product that monitored the resistance of a domestic earth ground connection.  The circuit also measured the earth ground current and the voltage with respect to the power line neutral wire.  System was used in conjunction with a transient voltage suppression system.  Received US Patent 7023680
 

Developed a system to monitor the concentration of a soap/water mixture used in carwash soap dispensing systems.  The method used an optical technique to maintain the desired soap concentration.  Wrote a description of the electronic circuit used in the monitor.  Over 3,000 systems were installed.  One patent pending.