Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6456202 | System for monitoring the status of a water softener | Jeffrey Zimmerman | 2002-09-24 |
| 5774529 | Apparatus to provide a remote display of the operating condition of a water treatment system | Jeffrey Zimmerman | 1998-06-30 |
| 5363087 | Apparatus for providing a regenerant solution to a regenerable liquid treatment medium bed | Ralph A. Larson, Jeffrey Zimmerman | 1994-11-08 |
| 4392417 | Variable dead band pressure control system | — | 1983-07-12 |
| 4257318 | Variable dead band pressure control system | — | 1981-03-24 |