Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9119979 | Method of controlling a powered air purifying respirator | Desmond T. Curran, Andrew Murphy, Alan Lee, Vladimir Dubrovskii, Bengt Kallman | 2015-09-01 |
| 8047664 | Control of an automatic darkening filter | Marcus T. R. Wiederkehr | 2011-11-01 |
| 7810937 | Control of an automatic darkening filter | Marcus T. R. Wiederkehr | 2010-10-12 |
| 7637622 | Control of an automatic darkening filter | Marcus T. R. Wiederkehr | 2009-12-29 |