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Friedhelm Stahlschmidt
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Sprockhovel, DE
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last 30 patents
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Patent Grant
Piston blank for a forged piston
Patent number
4,910,093
Issue date
Mar 20, 1990
Berchem & Schaberg GmbH
Rutger Berchem
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...