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  • Publication Date: December 31, 1969
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Cited By (5)

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    US-2008011027-A1January 17, 2008Yu Chun TPadlock
    US-2008047310-A1February 28, 2008Chun Te YuLock core operable by either of two keys
    US-2009266123-A1October 29, 2009Ulrich Mueller, Matthias Habecke, Dirk JacobLock Device with a Lock Cylinder and a Key
    US-2729091-AJanuary 03, 1956Ingersoll LtdKey operated lock mechanism
    US-7870771-B2January 18, 2011Huf Hulsbeck & Furst Gmbh & Co. KgLock device with a lock cylinder and a key