Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE34265 | Groundwater azimuth detection | John W. Foster | 1993-05-25 |
| 4963019 | Groundwater azimuth detection | John W. Foster | 1990-10-16 |
| 4807201 | Groundwater pressure measurement | John W. Foster | 1989-02-21 |