Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5647737 | Reciprocating pump with simplified seal replacement | Richard K. Gardner, Roger D. Wieland | 1997-07-15 |
| D380217 | Pneumatic motor | Richard K. Gardner, Gerald E. Smith, Roger D. Wieland | 1997-06-24 |