Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5697550 | Multi-layered insulated cup formed from folded sheet | Claus E. Sadlier | 1997-12-16 |
| 5660326 | Multi-layered insulated cup formed from folded sheet | Claus E. Sadlier | 1997-08-26 |