Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8011669 | Valve stem seal with gas relief features | David Sakata | 2011-09-06 |
| RE40764 | Two-piece valve stem seal | Milton Loman Griswold | 2009-06-23 |
| 6901902 | Two-piece valve stem seal | Milton Loman Griswold | 2005-06-07 |
| 6561519 | Dual seal | Christopher Conrad Frese | 2003-05-13 |