Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6618680 | Signal processor apparatus for rotating water current meter | Eugene Clark Hayes | 2003-09-09 |
| 6586760 | Water level measuring method and system | Eugene Clark Hayes, Michael George Zalants | 2003-07-01 |
| 6545286 | Method and apparatus for water level determination | Eugene Clark Hayes | 2003-04-08 |