Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D412705 | Combined portable microphone and speaker | James G. Kelsey, Carlton L. Cornell | 1999-08-10 |
| D330896 | Headphone control box | James G. Kelsey, Carlton L. Cornell | 1992-11-10 |
| 4700060 | Device for selectively routing audio signals bidirectionally along one or two signal paths | William H. Thompson, Carl L. Cornell | 1987-10-13 |
| 4232190 | Apparatus for combining phonograph signal with auxiliary audio signal | — | 1980-11-04 |