Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6298849 | Respirator mask with snap in filter cartridge | Terry L. Grimsley | 2001-10-09 |
| 6241120 | Wall mounted earplug dispenser with ratchet | Fred Joseph Ryan | 2001-06-05 |
| 6047698 | Unidirectional fluid valve | Mark Magidson | 2000-04-11 |
| 5970585 | Buckle for a respirator mask | — | 1999-10-26 |
| 5954229 | Wall mounted earplug dispenser | Chick Ngai, Norman John Smith | 1999-09-21 |
| D413465 | Impeller for earplug dispenser | Norman John Smith, Chick Ngai | 1999-09-07 |
| D411105 | Container | Mark Magidson | 1999-06-15 |
| D396283 | Respirator mask | — | 1998-07-21 |
| D389239 | Valve | — | 1998-01-13 |
| D387015 | Buckle | — | 1997-12-02 |
| 5505197 | Respirator mask with tapered filter mount and valve aligning pins and ears | — | 1996-04-09 |
| D338267 | Head band hearing protector | — | 1993-08-10 |
| D326540 | Filter mask | — | 1992-05-26 |
| 4544094 | Means for joining toy track sections | — | 1985-10-01 |