Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5344505 | Non-chromium passivation method and composition for galvanized metal surfaces | William L. Harpel | 1994-09-06 |
| 5292378 | Visible dried-in-place non-chrome treatment for aluminum | Bruce V. Haberle, Philip D. Deck, William L. Harpel | 1994-03-08 |