Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5273104 | Process for making cores used in investment casting | Edward C. Wingfield, Wallace W. Bowley | 1993-12-28 |
| 5094020 | Steam closet and hanger for the removal of wrinkles from clothing | Edward C. Wingfield | 1992-03-10 |