Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4572486 | Molten metal filtering vessel with internal filter | Daniel E. Groteke | 1986-02-25 |
| 4564175 | Molten metal transfer crucible with external filter | Daniel E. Groteke | 1986-01-14 |
| 4444377 | Molten metal transfer crucible | Daniel E. Groteke | 1984-04-24 |