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Thomas Havrichak
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Peckville, PA, US
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last 30 patents
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Patent Grant
Etched mold surface for use in making light-readable discs
Patent number
5,997,976
Issue date
Dec 7, 1999
Wea Manufacturing Inc.
William R. Mueller
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL