Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7694639 | Retractable mooring line device | Darrell C. Knight, Farhat Hanna | 2010-04-13 |
| 7325509 | Retractable mooring line device | Darrel C. Knight, Farhat Hanna | 2008-02-05 |
| 6095075 | Retractable boat line | Darrel C. Knight, Dusan Nikolic | 2000-08-01 |