Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10034992 | Speaking valve | — | 2018-07-31 |
| 9901693 | Pressure equalizing device | Andreas Hahn | 2018-02-27 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10034992 | Speaking valve | — | 2018-07-31 |
| 9901693 | Pressure equalizing device | Andreas Hahn | 2018-02-27 |