Sailing training aide

Office supplies; artists and teachers materials – Teaching material – Demonstrator or exhibitor

Patent

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Details

D12303, D10 45, D21130, 1907

Patent

active

D03940888

REFERENCES:
patent: D97100 (1935-10-01), Siemund
patent: D121686 (1940-07-01), Landon
patent: D223517 (1972-04-01), Crealock
patent: D311558 (1990-10-01), Stern
patent: D345051 (1994-03-01), Wills
patent: 3305943 (1967-02-01), Hansen
patent: 3570140 (1971-03-01), Sprong
patent: 3747230 (1973-07-01), Duval
patent: 4158263 (1979-06-01), Weihe, Jr.
patent: 4202114 (1980-05-01), Berson
patent: 4250635 (1981-02-01), Princevalle

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