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Wilfred G. Williamson
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Lethbridge, CA
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last 30 patents
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Patent Grant
Harrow
Patent number
4,770,252
Issue date
Sep 13, 1988
Airmaster Sales Ltd.
Wilfred G. Williamson
A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
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Patent Grant
Reciprocating harrow with parker
Patent number
4,685,524
Issue date
Aug 11, 1987
Airmaster Sales Ltd.
Wilfred G. Williamson
A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING