Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4523661 | Earphone system for use in large-cavity earcups | Jackson A. Aileo | 1985-06-18 |
| 4439645 | Sound attenuating earcup assembly with outside communication capability | — | 1984-03-27 |