Issued Patents 2020
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D895901 | Hearing protector | Robert C. Coffin, Matthew V. Stonebraker, Jr., Jacob H. Ely | 2020-09-08 |
| D889754 | Hearing protector | Robert C. Coffin, Matthew V. Stonebraker, Jr., Jacob H. Ely | 2020-07-07 |
| 10660797 | Push-to-fit earplug having an array of cavities | Jeffrey L. Hamer, Kenneth F. Teeters | 2020-05-26 |