Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4798023 | Method of controlling environmental conditions in the proximity of vegetation or crops with the aid of protective sheeting, protective sheeting for use in this method, and a protective device comprising sheeting | Gerhardus H. Morssinkhof, Adrianus Leenheer | 1989-01-17 |