Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6608908 | Electroacoustic communication device for use on protective headgear | Bernard Maden | 2003-08-19 |
| 6389606 | Protective helmet with an anchoring device for a respiratory mask | Louis Guay | 2002-05-21 |
| 6311338 | Arrangement for maintaining a protective helmet | — | 2001-11-06 |
| D439021 | Protective helmet | — | 2001-03-13 |
| 4734940 | Device for affixing a respiratory mask onto a protection helmet | Hans-Joachim Walther | 1988-04-05 |