Inventor
COWL DAVID J
US6 patents
Patents
6 patentsUS6411899B2Jun 25, 2002
Position based personal digital assistant
TRIMBLE NAVIGATION LTD444 citations98
US6266612B1Jul 24, 2001
Position based personal digital assistant
TRIMBLE NAVIGATION LTD496 citations98
US6088650AJul 11, 2000
Vehicle tracker, mileage-time monitor and calibrator
TRIMBLE NAVIGATION LTD95 citations98
US5938721AAug 17, 1999
Position based personal digital assistant
TRIMBLE NAVIGATION LTD1,269 citations98
US6353796B1Mar 5, 2002
Vehicle tracker, mileage-time monitor and calibrator
TRIMBLE NAVIGATION LTD60 citations96
US5987378ANov 16, 1999
Vehicle tracker mileage-time monitor and calibrator
TRIMBLE NAVIGATION LTD64 citations96