Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9845928 | In-ground lighting with external optics aiming system | Michael P. Leonhardt | 2017-12-19 |
| 9408938 | Aspirating photochemical odor control system for wastewater lift station and force main odors | Marvin F. Alford | 2016-08-09 |
| 8783916 | Steplight | Michael P. Leonhardt, Daniel F. Cunado | 2014-07-22 |
| 8753030 | Mounting knuckle | Michael P. Leonhardt | 2014-06-17 |
| 8337759 | Ozone-based odor control system for controlling hydrogen sulfide and other foul odors | Marvin F. Alford | 2012-12-25 |
| 8313208 | In-grade lighting system | Richard M. Schuler, Michael P. Leonhardt | 2012-11-20 |
| 7806550 | In-grade lighting system | Richard M. Schuler, Michael P. Leonhardt | 2010-10-05 |
| 7690816 | LED lighting system | Michael P. Leonhardt, Gabriel Perez | 2010-04-06 |
| 7621656 | Fluorescent lamp fixture and heater | — | 2009-11-24 |
| 7585088 | Fluorescent lamp fixture | — | 2009-09-08 |
| 7325946 | Fluorescent lamp fixture and heater | — | 2008-02-05 |
| 6068384 | Lighting system | Charles B. Poppenheimer, Michael P. Leonhardt | 2000-05-30 |
| 5727873 | Lighting system | — | 1998-03-17 |
| 5486988 | Lighting system | — | 1996-01-23 |
| 5408397 | Lighting system | — | 1995-04-18 |
| RE34709 | Lighting system | — | 1994-08-30 |
| 5276583 | Lighting system | — | 1994-01-04 |
| 5198962 | Lighting system | — | 1993-03-30 |
| 5041950 | Lighting system | — | 1991-08-20 |