Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4314907 | Oil additive compositions for internal combustion engines | Francis Defretin, Elisabeth Schoch, Alain Voisin | 1982-02-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4314907 | Oil additive compositions for internal combustion engines | Francis Defretin, Elisabeth Schoch, Alain Voisin | 1982-02-09 |