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Joseph W. Dupray Jr.
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Ipswich, MA, US
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last 30 patents
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Patent Grant
Drum extender apparatus for melting and dispensing hot melts
Patent number
5,148,947
Issue date
Sep 22, 1992
Bostik, Inc.
Edwin H. Epp
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL