Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9295585 | Ear muffler | Gregory D. Post | 2016-03-29 |
| 8161974 | Hearing protection apparatus with incorporated eyewear | Gregory D. Post, Robert J. DiNardo | 2012-04-24 |
| 8107638 | Semi-insert hearing protector having a helmholtz-type resonator | — | 2012-01-31 |
| 5824967 | Ear muffler | — | 1998-10-20 |
| 5153387 | Layered earplug | Richard B. Mitchell | 1992-10-06 |