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| Patents for Derek Foster | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,476,801 | Oct. 16, 1984 | D. Foster, C. Rich | Mooring device | ||
| 4,722,293 | Feb. 02, 1988 | D. Foster, R. Ballantyne | Integrated winch and windlass | ||