Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874431 | Low volatility water repellents | Kenneth Christopher Fey, Alan L. Freiberg | 1989-10-17 |
| 4846886 | Water beading-water shedding repellent composition | Kenneth Christopher Fey | 1989-07-11 |