Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5622464 | Screw with increased driving resistance at proper depth | Michael C. Dill, James W. McElderry | 1997-04-22 |
| 5605018 | Flexible roof end cap | James W. McElderry, Michael C. Dill, John A. Wand, John Fox | 1997-02-25 |