Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5749822 | Gusset folding mechanism and method for plastic bag making machine | William D. Ellsworth, David I. Laber | 1998-05-12 |
| 5529659 | Machine and associated apparatus for attaching zippers to plastic bags | William D. Ellsworth, David I. Laber | 1996-06-25 |