Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6463702 | Concrete safe room | Robert G. Martin | 2002-10-15 |
| 6427406 | Monolithic stud form for concrete wall production | Robert G. Martin | 2002-08-06 |
| 6151843 | Prefabricated wall panels connecting system | Robert G. Martin, Jan L. Weaver | 2000-11-28 |
| 6003278 | Monolithic stud form for concrete wall production | Robert G. Martin | 1999-12-21 |
| 5865001 | Prefabricated wall panels connecting system | Robert G. Martin | 1999-02-02 |