Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11589163 | Headphone earcup mount in continuous headband-spring headphone system | Eric Douglas Curtiss, Allen T. Graff, Richard Arthur Grebe | 2023-02-21 |
| 11272287 | Headphone earcup mount in continuous headband-spring headphone system | Eric Douglas Curtiss, Allen T. Graff, Richard Arthur Grebe | 2022-03-08 |
| 10848870 | Headphone earcup mount in continuous headband-spring headphone system | Eric Douglas Curtiss, Allen T. Graff, Richard Arthur Grebe | 2020-11-24 |
| 10743106 | Headphone earcup mount in continuous headband-spring headphone system | Eric Douglas Curtiss, Allen T. Graff, Richard Arthur Grebe | 2020-08-11 |
| 10368157 | Adjustable earcup in continuous headband-spring headphone system | Benjamin Zelnick, Daniel P. Baker | 2019-07-30 |
| 10334352 | Headphone pivot joint | Benjamin Zelnick | 2019-06-25 |