Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824464 | Process and apparatus for heating glass sheets | Francis Perin | 1989-04-25 |
| 4813993 | Device for forming glass | Bernard Letemps, Jean-Mark Petitcollin, Francis Perin, Jean Lissillour, deceased | 1989-03-21 |