Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7988511 | Freediving safety apparatus | Henry M. (Chip) Bissell, IV, Sheri Gayle Daye, Terry L. Maas, Jason R. Bush, David Sipperly +2 more | 2011-08-02 |
| D600640 | Extension battery | Mark Stein, David Douglass | 2009-09-22 |
| 5265166 | Multi-channel sound simulation system | Robert J. Rapoport | 1993-11-23 |
| 4295277 | Stylus positioner | Francis G. Dennesen, Richard S. Wilson, Roy D. Toulan, Jr. | 1981-10-20 |