Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6175803 | Vehicle navigation route generation with user selectable risk avoidance | Andrea Bowes Chowanic | 2001-01-16 |
| 5060156 | Method and apparatus for determining engine oil change intervals according to actual engine use | Jeffery L. Vajgart, Peter W. Misangyi, Parshuram G. Date, Roger S. Heitzeg, Noel A. Walker +1 more | 1991-10-22 |
| 5003801 | Programmable key and improved lock assembly | Robert P. Stinar, George Calvas | 1991-04-02 |
| 4446447 | Circuit for converting pressure variation to frequency variation | — | 1984-05-01 |
| 4377851 | Method for calibrating a transducer for converting pressure variation to frequency variation | — | 1983-03-22 |