Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D336051 | Water softener control and indicating panel | Michael E. Drager, Jeffrey Zimmerman, John R. Nelson | 1993-06-01 |
| D328330 | Water softener | Michael E. Drager, Edward J. Tischler | 1992-07-28 |
| D328331 | Water softener | Michael E. Drager, Edward J. Tischler | 1992-07-28 |
| 4722797 | Method for regeneration of a water softener | Gary W. Gauer, Duane D. Nowlin, Thomas Weber | 1988-02-02 |
| 4347224 | Chemical dispenser | Adolf F. Beckert, Duane D. Nowlin | 1982-08-31 |
| 4332685 | Method and apparatus for treating water | Duane D. Nowlin | 1982-06-01 |