Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4784664 | Non-chrome tanning method | Marcel Siegler, Joseph L. Suarez, Colin Quinn | 1988-11-15 |
| 4740211 | Chromium-free tanning process | Marcel Siegler, Joseph L. Suarez, Colin Quinn | 1988-04-26 |