Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5531586 | Interlocking checker brick mold | — | 1996-07-02 |
| 5474726 | Method of making interlocking checker bricks | — | 1995-12-12 |
| 5358031 | Interlocking checker bricks and method and apparatus for making | — | 1994-10-25 |
| 5299629 | Interlocking checker bricks | — | 1994-04-05 |
| 5287780 | Radial arm saw guard with operational interlock | James I. Metzger, Jr., Robert E. Steiner | 1994-02-22 |
| 4940081 | Checker brick | — | 1990-07-10 |
| 4478575 | Blast furnace stove outlet | — | 1984-10-23 |
| 4419075 | Blast furnace stove wall | — | 1983-12-06 |
| 4201543 | Hot blast stove breast wall | — | 1980-05-06 |