Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6134853 | Interlocking insulated building block system | — | 2000-10-24 |
| 5822939 | Insulated building block system | — | 1998-10-20 |
| 5575128 | Interlocking mortarless building block system | — | 1996-11-19 |
| 4854097 | Insulated interlocking building blocks | — | 1989-08-08 |
| 4640071 | Interlocking building block | — | 1987-02-03 |