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Karl-Hans Sackmann
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Erzgrube, DT
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last 30 patents
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Patent Grant
Door securing light barrier
Patent number
4,097,733
Issue date
Jun 27, 1978
Erwin Sick Gesellschaft mit beschrankter Haftung Optik-Elektronik
Erwin Langenbach
E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES