Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5372656 | Process for producing manganese-containing zinc phosphate coatings on galvanized steel | — | 1994-12-13 |
| 5312492 | Process not using chlorate or nitrite for the production of nickel and manganese containing zinc phosphate films | Kurt Hosemann, Karl-Heinz Gottwald | 1994-05-17 |