Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5908004 | Method and apparatus for manipulating and sewing flexible fabrics | Michael R. Porter, Steven Marcangelo, John J. Kirby | 1999-06-01 |
| 5782190 | Apparatus for assembly of pillow-top mattress covers | Michael R. Porter, John J. Kirby | 1998-07-21 |
| 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 |
| 5586511 | Method and apparatus for assembly of pillow-top mattress covers | Michael R. Porter, John J. Kirby | 1996-12-24 |
| 5529004 | Method and apparatus for manipulating and sewing flexible fabrics | Michael R. Porter, Steven Marcangelo, John J. Kirby | 1996-06-25 |
| 5526761 | Method and apparatus for closing mattresses | Michael R. Porter, John J. Kirby | 1996-06-18 |
| 5501164 | Apparatus for assembly of pillow-top mattress covers | Michael R. Porter, John J. Kirby | 1996-03-26 |
| 5309854 | High lift sewing machine | John J. Kirby, Michael R. Porter | 1994-05-10 |