Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9539637 | Investment casting refractory material | Eric Hellstrom | 2017-01-10 |
| 9539638 | Modular casting sprue assembly | Eric Hellstrom | 2017-01-10 |
| 9381564 | 3-D printed casting shell and method of manufacture | Eric E. Hellmstrom, Charles M. Olson | 2016-07-05 |
| 7278465 | Investment casting slurry composition and method of use | Eric Hellstrom | 2007-10-09 |
| 7128129 | Investment casting slurry composition and method of use | — | 2006-10-31 |
| 4688365 | Modular building block | — | 1987-08-25 |