Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4670066 | Process for the treatment by chemical conversion of substrates of zinc or of one of its alloys, concentrate and bath used for performing this process | Joseph Schapira, Victor Ken, Patrick Regnard | 1987-06-02 |
| 4311536 | Processes of phosphating surfaces of iron and of steel with manganese | Joseph Schapira, Victor Ken, Jean-Claude Masson | 1982-01-19 |