Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857209 | Method for controlling macroinvertebrates | Dwight P. Davis, Paul Swered | 1989-08-15 |
| 4816163 | Method for controlling macroinvertebrates | Dwight P. Davis, Paul Swered | 1989-03-28 |