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| Number | Title | Issue Date |
| 5009178 | Self activating keel A keel system for small sailboats. The keel system being comprised of two fins (20P) and (20S) that are allowed to swing on pivots (24) independently, between the hull on which they are mounted and a limiting surface (25). The deployment of fins (20P) and... | 04/23/1991 |
