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Josef Hagemann
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Obereichstatt, DE
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last 30 patents
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Patent Grant
High melting point glass-to-metal seal and melt connection, particu...
Patent number
4,282,395
Issue date
Aug 4, 1981
Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
Josef Hagemann
C03 - GLASS MINERAL OR SLAG WOOL