David C. Hill

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Oakville, CA

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Patents Grantslast 30 patents

Information Patent Grant
Navigation device having a viewer for superimposing bearing, GPS po...
- Patent number 6,016,606
- Issue date Jan 25, 2000
- Navitrak International Corporation
- Michael F. Oliver
- G01 - MEASURING TESTING
Information Patent Grant
Navigation aid with biangulation
- Patent number 5,461,792
- Issue date Oct 31, 1995
- Navitrak Corp.
- David C. Hill
- G01 - MEASURING TESTING
Information Patent Grant
Transparency holder for navigation aid
- Patent number 5,339,528
- Issue date Aug 23, 1994
- Navimap Corporation
- David C. Hill
- G01 - MEASURING TESTING
Information Patent Grant
Navigation aid
- Patent number 5,060,390
- Issue date Oct 29, 1991
- Navitrak Corp.
- David C. Hill
- G01 - MEASURING TESTING