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| US4615193 | 23 févr. 1984 | 7 oct. 1986 | Burg-Wachter KG Alfred Luling | Combination lock | | US5133265 | 8 avr. 1991 | 28 juil. 1992 | Tab Products Company | Visual indicator with aligning ridges for indicating the status of a carriage lock for a mobile storage system having a rotatable lock actuator knob |
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