Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5867864 | Hand held turbine powered extractor nozzle | Daniel R. Miller, A. Ronald Keebler, Douglas E. Gerber | 1999-02-09 |
| D398100 | Carpet extractor | Ronald J. Stephens, Darwin S. Crouser, Darwin T. McKnight, Edgar A. Maurer | 1998-09-08 |
| 5443362 | Air turbine | Timothy E. Crites, Joseph W. Clifford, Darwin S. Crouser | 1995-08-22 |