Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5698239 | Heating mechanism for zipper forming machines | Ray-Long Tsai | 1997-12-16 |
| 5688539 | Zipper teeth forming mechanism for zipper forming machines | Ray-Long Tsai | 1997-11-18 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5698239 | Heating mechanism for zipper forming machines | Ray-Long Tsai | 1997-12-16 |
| 5688539 | Zipper teeth forming mechanism for zipper forming machines | Ray-Long Tsai | 1997-11-18 |