Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5853572 | Home water purification system | Roy W. Kuennen, Robin M. Dykhouse, Dennis J. Kool, Ronald C. Markham, Bradley J. Pippel +1 more | 1998-12-29 |
| 5698091 | Home water purification system with filter end of life monitor | Roy W. Kuennen, Robin M. Dykhouse, Dennis J. Kool, Ronald C. Markham, Bradley J. Pippel +1 more | 1997-12-16 |
| 5536395 | Home water purification system with automatic disconnecting of radiant energy source | Roy W. Kuennen, Robin M. Dykhouse, Dennis J. Kool, Ronald C. Markham, Bradley J. Pippel +1 more | 1996-07-16 |
| 5393419 | Ultraviolet lamp assembly for water purification | Dennis J. Kool, Kenneth E. Lew | 1995-02-28 |