Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5456777 | Method of making vandal resistant seat | Ronald S. Park, John A. Clements | 1995-10-10 |
| 5259896 | Method of making vandal resistant seat | Ronald S. Park, John A. Clements | 1993-11-09 |
| 4828908 | Vandal resistant seat | Ronald S. Park, John A. Clements | 1989-05-09 |