Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6820630 | Swiveling intake elbow for dry sectional gate valve | Ross Mack, Robert W. Steingass | 2004-11-23 |
| D456677 | Folding spanner wrench | David J. Kolacz | 2002-05-07 |
| 6308355 | Multipurpose emergency tool | Stewart G. McMillan, David J. Kolacz, James H. Walker | 2001-10-30 |