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Dennis L. Hvam
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Eden Prairie, MN, US
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Patent Grant
Method of producing polyurethane injection molded in-line skate wheels
Patent number
5,312,844
Issue date
May 17, 1994
S&W Plastics, Inc.
Stanley W. Gonsior
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL