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Helmut Dederra
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Ottobrunn, DE
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Patent Grant
Press mould half, more especially for producing records
Patent number
4,245,811
Issue date
Jan 20, 1981
Messerschmitt-Bolkow-Blohm Gesellschaft mit beschrankter Haftung
Winfried Brunner
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL