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Helleberg; Niels C.
Swampscott, MA
No. of patents:

Patent Number Title Of Patent Date Issued
5351638 Keel assembly for a sailboat October 4, 1994
A keel assembly for a sailboat includes a base portion which is integrally formed with the underside of the hull of the sailboat, a keel portion which is adapted to be releasably received in assembled relation with the base portion, and a plurality of fastening element assemblies for sec

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