Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6134921 | Directly cooled, side fired forehearth | James D. Hull, Philip D. Perry | 2000-10-24 |
| 5944864 | Directly cooled, side fired forehearth | James D. Hull, Philip D. Perry | 1999-08-31 |
| 5718741 | Directly cooled, side fired forehearth | James D. Hull, Philip D. Perry | 1998-02-17 |
| 4389725 | Electric boosting control for a glass forehearth | Marvin L. Barkhau, Philip D. Perry | 1983-06-21 |