Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5182934 | Dual lane conversion system | Frank J. Herdzina | 1993-02-02 |
| 5017072 | Dual lane conversion system | Frank J. Herdzina | 1991-05-21 |
| 4904140 | Dual lane conversion system | Frank J. Herdzina | 1990-02-27 |
| 4854799 | Dual lane conversion system | Frank J. Herdzina | 1989-08-08 |