Issued Patents 2016
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9522246 | Mask with gusset | Robert Henry Frater, Joanne Elizabeth Drew | 2016-12-20 |
| 9308344 | Respiratory valve apparatus | Michael David Hallett, Allan Nils Gregersen | 2016-04-12 |
| 9248251 | Mask with integral cushion and forehead piece | — | 2016-02-02 |