Keel structures for sailing vessels
Patent 4920906 Issued on May 1, 1990. Estimated Expiration Date: 
November 29, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 29, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References537667 InventorApplicationNo. 277493 filed on 11/29/1988US Classes:114/140KEELSExaminersPrimary: Peters, Joseph F. Jr.Assistant: Swinehart, Edwin L. Attorney, Agent or FirmForeign Patent References
International ClassesB63B 003/38B63H 025/38 Foreign Application Priority Data1983-08-23 GBAbstractA tandem keel structure (12) for a sailing vessel such as a yacht (10) comprises a main keel (14). A bridge (16) extends forwardly from the foot of the main keel (14) and a forward foil (18) is attached between the forward end of the bridge (16) and the hull of the yacht. The forward foil (18) is separated from the main keel or foil (14) by a slot (20). | |
