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Patents Grants
last 30 patents
Information
Patent Grant
Multi-level lock system and method
Patent number
4,325,242
Issue date
Apr 20, 1982
ZEISS IKON AG Goerzwerk
Werner Tietz
E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information
Patent Grant
Cylinder lock with warning of entry and drilling attempts
Patent number
4,262,506
Issue date
Apr 21, 1981
Zeiss Ikon AG Goerzwerk
Helmut Tobel
E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information
Patent Grant
Cylinder lock with a lock picking impediment
Patent number
4,222,252
Issue date
Sep 16, 1980
Zeiss Ikon AG Goerzwerk
Werner Tietz
E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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