Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6557556 | Forehead support for facial mask | Philip Rodney Kwok, William Edwin John Grant | 2003-05-06 |
| 6532961 | Forehead support for facial mask | Philip Rodney Kwok, Michael Kassipillai Gunaratnam, Perry David Lithgow, Jonathan P. Harrison, Jonathan Lee Liston +1 more | 2003-03-18 |