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Hans J. Schrecke
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Grasbrunn, DE
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Patents Grants
last 30 patents
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Patent Grant
Source distance adjustment arrangement for uniform illumination of...
Patent number
5,200,603
Issue date
Apr 6, 1993
AGFA-Gevaert A.G.
Hubert Hackenberg
G02 - OPTICS
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Patent Grant
Projection copying apparatus and projection screen therefor
Patent number
5,003,343
Issue date
Mar 26, 1991
AGFA-Gevaert A.G.
Hubert Hackenberg
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY