Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D337633 | Bypass valve for a liquid treatment tank | Edward J. Tischler | 1993-07-20 |
| D336051 | Water softener control and indicating panel | Dennis G. Winberg, Jeffrey Zimmerman, John R. Nelson | 1993-06-01 |
| 5162080 | Rotary flow control valve | Bruce Gillette, Edward J. Tischer | 1992-11-10 |
| 5152321 | Bypass valve | Edward J. Tischler | 1992-10-06 |
| D328330 | Water softener | Edward J. Tischler, Dennis G. Winberg | 1992-07-28 |
| D328331 | Water softener | Edward J. Tischler, Dennis G. Winberg | 1992-07-28 |