Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4253410 | Relief brickwork over opening in refractory brick wall | Walter Laux, Martin Zettel | 1981-03-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4253410 | Relief brickwork over opening in refractory brick wall | Walter Laux, Martin Zettel | 1981-03-03 |