Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7958839 | Convertible top for yacht | John Donahue, David L. Draper, Keith S. Attee | 2011-06-14 |
| 7669542 | Convertible top for yacht | John Donahue, David L. Draper, Keith S. Attee | 2010-03-02 |
| 4259931 | Valve selector module assembly | David P. Clark | 1981-04-07 |