Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12138495 | Filter and method | Mark Magidson | 2024-11-12 |
| D1021095 | Filter cartridge for a filter facepiece | Mark Magidson | 2024-04-02 |
| D1019951 | Filter cartridge for a filter facepiece | Mark Magidson | 2024-03-26 |
| 11872416 | Filter and method | Mark Magidson | 2024-01-16 |
| 10834980 | Pleated filtering face piece respirator | Mark Magidson | 2020-11-17 |
| 10441469 | Corded earplug | Mark Magidson, Fred Joseph Ryan | 2019-10-15 |
| 9622546 | Clamp for adjustably joining the ends of a strap | — | 2017-04-18 |
| 9282390 | Dual mode in-ear headphone | — | 2016-03-08 |
| 8671948 | Corded earplugs | — | 2014-03-18 |
| D700317 | Pleated respirator mask | Terry L. Grimsley, Mark Magidson | 2014-02-25 |
| 8413663 | Push-in type of earplug with improved insertion stem | Mark Magidson | 2013-04-09 |
| D677777 | Earplug with stem insertion member | — | 2013-03-12 |
| D677779 | Pleated respirator mask | Terry L. Grimsley, Mark Magidson | 2013-03-12 |
| D676954 | Dual mode attenuating earplug | — | 2013-02-26 |
| 8161975 | Dual mode impulse noise protecting earplug (D-182) | — | 2012-04-24 |
| D647197 | Flat fold respirator mask | Terry L. Grimsley | 2011-10-18 |
| D624999 | Earplug | Mark Magidson | 2010-10-05 |
| D618333 | Earplug insert for dual mode operation | — | 2010-06-22 |
| D617891 | Earplug | — | 2010-06-15 |