Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6837265 | One way anti-back flow valve | Stephen P. Porter | 2005-01-04 |
| 6357473 | One way anti-backflow valve | Stephen P. Porter | 2002-03-19 |
| 5842659 | Lever actuator | James T. Ligon, Sr., Stephen P. Porter | 1998-12-01 |
| 5681005 | Lever actuator | James T. Ligon, Sr., Stephen P. Porter | 1997-10-28 |