Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8182613 | Radiometer including a cleaning system | Steven R. Semmer, David D. Richter, Steve Oncley, Karl T. Schwenz | 2012-05-22 |
| 5923037 | Device for determining the ozone concentration in air | Rainer Stager, Gerd Uhlemann, Reinhold Busen, Hans Gusten | 1999-07-13 |
| 5553508 | Portable intelligent whole air sampling system | Walter F. Dabberdt, Kenneth D. Norris, Steven R. Semmer, Jack R. Fox | 1996-09-10 |