Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5308803 | Glass compositions | John F. Clifford, Peter J. Smith | 1994-05-03 |
| 5244848 | Glaze compositions | John F. Clifford | 1993-09-14 |
| 5200369 | Glaze compositions | John F. Clifford | 1993-04-06 |