Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10250968 | Loudspeaker system | Jahn Dmitri Eichfeld, Wontak Kim, Michael Stark | 2019-04-02 |
| 9487305 | Communications quality analysis | Yifan Yang, Elwyn William Hubbard, Christopher J. Devine, Gregory W. Smith | 2016-11-08 |
| 9220018 | Communications quality analysis | Yifan Yang, Elwyn William Hubbard, Christopher J. Devine, Gregory W. Smith | 2015-12-22 |
| 4991221 | Active speaker system and components therefor | — | 1991-02-05 |