Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10014722 | Inductively coupled ballast circuit | Roy W. Kuennen, David W. Baarman, Scott A. Mollema, Dennis J. Denen | 2018-07-03 |
| 9590456 | Inductively coupled ballast circuit | Roy W. Kuennen, David W. Baarman, Scott A. Mollema, Dennis J. Denen | 2017-03-07 |
| 9482440 | Humidifier with ultraviolet disinfection | Matthew J. Barton | 2016-11-01 |
| 9397524 | Inductively coupled ballast circuit | Roy W. Kuennen, David W. Baarman, Scott A. Mollema, Dennis J. Denen | 2016-07-19 |
| 9299493 | Inductively coupled ballast circuit | Roy W. Kuennen, David W. Baarman, Scott A. Mollema, Dennis J. Denen | 2016-03-29 |
| 8940085 | Humidifier with ultraviolet disinfection | Matthew J. Barton | 2015-01-27 |
| 8618749 | Inductively coupled ballast circuit | Roy W. Kuennen, David W. Baarman, Scott A. Mollema, Dennis J. Denen | 2013-12-31 |
| 8222827 | Inductively coupled ballast circuit | Roy W. Kuennen, David W. Baarman, Scott A. Mollema, Dennis J. Denen | 2012-07-17 |
| 7385357 | Inductively coupled ballast circuit | Roy W. Kuennen, David W. Baarman, Scott A. Mollema, Dennis J. Dennen | 2008-06-10 |
| 7180248 | Inductively coupled ballast circuit | Roy W. Kuennen, David W. Baarman, Scott A. Mollema, Dennis J. Denen | 2007-02-20 |
| 6825620 | Inductively coupled ballast circuit | Roy W. Kuennen, Scott A. Mollema, David W. Baarman, Dennis J. Denen | 2004-11-30 |
| 6673250 | Radio frequency identification system for a fluid treatment system | Roy W. Kuennen, David W. Baarman, Scott A. Mollema, Terry L. Lautzenheiser | 2004-01-06 |
| 6436299 | Water treatment system with an inductively coupled ballast | David W. Baarman, Roy W. Kuennen, Dennis J. Denen, Terry L. Lautzenheiser, Scott A. Mollema | 2002-08-20 |
| 5853572 | Home water purification system | Roy W. Kuennen, Robin M. Dykhouse, Dennis J. Kool, Bradley J. Pippel, Dennis E. Kidd +1 more | 1998-12-29 |
| 5738780 | Voltage converter for water treatment system UV bulb | — | 1998-04-14 |
| 5698091 | Home water purification system with filter end of life monitor | Roy W. Kuennen, Robin M. Dykhouse, Dennis J. Kool, Bradley J. Pippel, Dennis E. Kidd +1 more | 1997-12-16 |
| 5611918 | Electronic driver for water treatment system UV bulb | — | 1997-03-18 |
| 5536395 | Home water purification system with automatic disconnecting of radiant energy source | Roy W. Kuennen, Robin M. Dykhouse, Dennis J. Kool, Bradley J. Pippel, Dennis E. Kidd +1 more | 1996-07-16 |
| 5401394 | Water treatment system ultraviolet bulb voltage monitor circuit | — | 1995-03-28 |
| 5324423 | UV bulb intensity control for water treatment system | — | 1994-06-28 |