Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6773682 | Apparatus and method for purifying air | — | 2004-08-10 |
| 6685891 | Apparatus and method for purifying air | John E. Groetsema | 2004-02-03 |
| 5798945 | Apparatus for building environmental reporting and control | — | 1998-08-25 |
| 5564065 | Carbon monoxide air filter | Michael Fleck | 1996-10-08 |
| 5553006 | Method and apparatus for building environmental compliance | — | 1996-09-03 |