Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4741378 | Sprue pin for producing castings | Melvin A. Engelman, Lori D. Cooke | 1988-05-03 |
| 4558841 | Spruing assembly | Melvin A. Engelman, Curtis L. Engelman | 1985-12-17 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4741378 | Sprue pin for producing castings | Melvin A. Engelman, Lori D. Cooke | 1988-05-03 |
| 4558841 | Spruing assembly | Melvin A. Engelman, Curtis L. Engelman | 1985-12-17 |