Markham; Ronald C.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Markham; Ronald C..The latest application filed is for "inductively coupled ballast circuit".
- Markham; Ronald C. - Grand Rapids MI
- Markham; Ronald C. - Ada MI
- - Grand Rapids MI US
- Markham; Ronald C. - Tokyo JP
- Markham; Ronald C. - Kentwood MI
| Patent | Date |
|---|---|
| Inductively coupled ballast circuit Grant 10,014,722 - Kuennen , et al. July 3, 2 | 2018-07-03 |
| Inductively Coupled Ballast Circuit App 20170133882 - Kuennen; Roy W. ; et al. | 2017-05-11 |
| Inductively coupled ballast circuit Grant 9,590,456 - Kuennen , et al. March 7, 2 | 2017-03-07 |
| Humidifier With Ultraviolet Disinfection App 20170038083 - Markham; Ronald C. ; et al. | 2017-02-09 |
| Humidifier with ultraviolet disinfection Grant 9,482,440 - Markham , et al. November 1, 2 | 2016-11-01 |
| Inductively Coupled Ballast Circuit App 20160261143 - Kuennen; Roy W. ; et al. | 2016-09-08 |
| Inductively coupled ballast circuit Grant 9,397,524 - Kuennen , et al. July 19, 2 | 2016-07-19 |
| Inductively Coupled Ballast Circuit App 20160172907 - Kuennen; Roy W. ; et al. | 2016-06-16 |
| Inductively coupled ballast circuit Grant 9,299,493 - Kuennen , et al. March 29, 2 | 2016-03-29 |
| Humidifier With Ultraviolet Disinfection App 20150090121 - Markham; Ronald C. ; et al. | 2015-04-02 |
| Humidifier with ultraviolet disinfection Grant 8,940,085 - Markham , et al. January 27, 2 | 2015-01-27 |
| Inductively Coupled Ballast Circuit App 20140077696 - Kuennen; Roy W. ; et al. | 2014-03-20 |
| Inductively coupled ballast circuit Grant 8,618,749 - Kuennen , et al. December 31, 2 | 2013-12-31 |
| Inductively coupled ballast circuit Grant 08618749 - | 2013-12-31 |
| Humidifier With Ultraviolet Disinfection App 20120234166 - Markham; Ronald C. ; et al. | 2012-09-20 |
| Inductively coupled ballast circuit Grant 8,222,827 - Kuennen , et al. July 17, 2 | 2012-07-17 |
| Inductively Coupled Ballast Circuit App 20120001562 - Kuennen; Roy W. ; et al. | 2012-01-05 |
| Inductively Coupled Ballast Circuit App 20080191638 - Kuennen; Roy W. ; et al. | 2008-08-14 |
| Inductively coupled ballast circuit Grant 7,385,357 - Kuennen , et al. June 10, 2 | 2008-06-10 |
| Inductively Coupled Ballast Circuit App 20070085487 - Kuennen; Roy W. ; et al. | 2007-04-19 |
| Inductively coupled ballast circuit Grant 7,180,248 - Kuennen , et al. February 20, 2 | 2007-02-20 |
| Inductively coupled ballast circuit App 20050093475 - Kuennen, Roy W. ; et al. | 2005-05-05 |
| Inductively coupled ballast circuit Grant 6,825,620 - Kuennen , et al. November 30, 2 | 2004-11-30 |
| Radio frequency identification system for a fluid treatment system Grant 6,673,250 - Kuennen , et al. January 6, 2 | 2004-01-06 |
| Inductively coupled ballast circuit App 20030015479 - Kuennen, Roy W. ; et al. | 2003-01-23 |
| Radio frequency identification system for a fluid treatment system App 20030015478 - Kuennen, Roy W. ; et al. | 2003-01-23 |
| Water treatment system with an inductively coupled ballast Grant 6,436,299 - Baarman , et al. August 20, 2 | 2002-08-20 |
| Home water purification system Grant 5,853,572 - Kuennen , et al. December 29, 1 | 1998-12-29 |
| Voltage converter for water treatment system UV bulb Grant 5,738,780 - Markham April 14, 1 | 1998-04-14 |
| Home water purification system with filter end of life monitor Grant 5,698,091 - Kuennen , et al. December 16, 1 | 1997-12-16 |
| Electronic driver for water treatment system UV bulb Grant 5,611,918 - Markham March 18, 1 | 1997-03-18 |
| Home water purification system with automatic disconnecting of radiant energy source Grant 5,536,395 - Kuennen , et al. July 16, 1 | 1996-07-16 |
| Water treatment system ultraviolet bulb voltage monitor circuit Grant 5,401,394 - Markham March 28, 1 | 1995-03-28 |
| UV bulb intensity control for water treatment system Grant 5,324,423 - Markham June 28, 1 | 1994-06-28 |
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