Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6838886 | Method and apparatus for measuring inductance | Steven R. Hilliard | 2005-01-04 |
| 6803859 | Method and apparatus for active isolation in inductive loop detectors | Stephen Hilliard | 2004-10-12 |
| 6639521 | Inductive sensor and method of use | Steven R. Hilliard | 2003-10-28 |
| 6611210 | Automotive vehicle classification and identification by inductive signature | Steven R. Hilliard | 2003-08-26 |
| 6417784 | Automotive vehicle classification and identification by inductive signature | Steven R. Hilliard | 2002-07-09 |
| 6380868 | Permeability-modulated carrier referencing | Steven R. Hilliard | 2002-04-30 |
| 6342845 | Automotive vehicle classification and identification by inductive signature | Steven R. Hilliard | 2002-01-29 |
| 6337602 | Method and apparatus for active isolation in inductive loop detectors | Steven R. Hilliard | 2002-01-08 |