Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5718514 | Multiwall bag | Stephen John Grace, John Frederick Robinson, Andreas Karl Haussrer, Eric John Brown, Michael John Kane +2 more | 1998-02-17 |
| 5644900 | Multiwall bag | Stephen John Grace, John Frederick Robinson, Andreas Karl Haussrer, Eric John Brown, Michael John Kane +2 more | 1997-07-08 |