Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6712095 | Vacuum demand valve | Mark Williamson, Scott R. Ariagno, Alan W. Marttila, Arnold C. Bilstad, Paul M. DiPerna +5 more | 2004-03-30 |
| 6672333 | Vacuum demand valve | Mark Williamson, Scott R. Ariagno, Alan W. Marttila, Arnold C. Bilstad, Paul M. DiPerna +5 more | 2004-01-06 |