Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8833369 | Breathing air filtration devices | David M. Dolezal, Daniel M. Gelfman | 2014-09-16 |
| 7918224 | Breathing air filtration system | David M. Dolezal, Daniel M. Gelfman | 2011-04-05 |
| 7918225 | Breathing air filtration devices | David M. Dolezal, Daniel M. Gelfman | 2011-04-05 |
| D595848 | Breathing air dilation device | David M. Dolezal, Daniel M. Gelfman | 2009-07-07 |
| D572360 | Breathing air filtration device | David M. Dolezal, Daniel M. Gelfman | 2008-07-01 |
| D571457 | Breathing air filtration device | David M. Dolezal, Daniel M. Gelfman | 2008-06-17 |
| 7156098 | Breathing air filtration system | David M. Dolezal | 2007-01-02 |