Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5678502 | Variable walking foot apparatus for a sewing machine for mattresses | Michael R. Porter, John J. Kirby | 1997-10-21 |
| 5664508 | Method and apparatus for forming the side panel of a mattress sack | Michael R. Porter | 1997-09-09 |