Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4980992 | Revolving door assembly with foldable door wings | William S. Liles, Jr., David Paul Hewitt | 1991-01-01 |
| D307940 | Revolving door enclosure | — | 1990-05-15 |
| 4706227 | Acoustic obstruction detector and method | Dale R. DuVall, John E. Bateson, David Paul Hewitt | 1987-11-10 |