Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8703051 | Sanitizing headsets during a period of non-use | Stephen Trabalka, Martin Siegel | 2014-04-22 |
| 8597588 | Sanitizing headsets during a period of non-use | Stephen Trabalka, Martin Siegel | 2013-12-03 |
| 5374969 | Portable overhead projector | Henry Kyhl | 1994-12-20 |