Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6691765 | Products for the manufacture of molds and cores used in metal casting and a method for their manufacture and recycle from crushed rock | Robert E. Sparks | 2004-02-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6691765 | Products for the manufacture of molds and cores used in metal casting and a method for their manufacture and recycle from crushed rock | Robert E. Sparks | 2004-02-17 |