Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4804944 | Hall effect liquid level sensing apparatus and method | Joseph Marcus Elder | 1989-02-14 |
| 4523460 | Fluid measuring, testing and accounting system | Steven E. Strickler, Jerry C. Simmons, Andrew D. Goldstein | 1985-06-18 |