Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6393776 | Tornado shelter with composite structure and concrete tub encasement | Ian E. McElwain | 2002-05-28 |
| 5813174 | Closet vault | — | 1998-09-29 |
| 4548624 | Hygroscopic breather cap | — | 1985-10-22 |
| 4504289 | Hygroscopic breather cap | — | 1985-03-12 |