Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6026845 | Flow, split Venturi, axially-rotated valve | David E. Walrath, William R. Lindberg, Robert K. Burgess | 2000-02-22 |
| 4580590 | Automatic air valve assembly | Edwin P. Brinkel, L. Douglas Blatt | 1986-04-08 |