Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4784664 | Non-chrome tanning method | Marcel Siegler, Ernest Diamont, Colin Quinn | 1988-11-15 |
| 4740211 | Chromium-free tanning process | Marcel Siegler, Ernest Diamont, Colin Quinn | 1988-04-26 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4784664 | Non-chrome tanning method | Marcel Siegler, Ernest Diamont, Colin Quinn | 1988-11-15 |
| 4740211 | Chromium-free tanning process | Marcel Siegler, Ernest Diamont, Colin Quinn | 1988-04-26 |