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US2763299A
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Lock installation tool
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US2741502A
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Door knob latch set
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US2660466A
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Doorknob and tubular spindle assembly
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US2664306A
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Latch retractor and housing
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US2694309A
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Lock-out-proof doorknob lock and latch set
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US2646301A
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Mounting means for door latches
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US2618955A
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Doorknob lock and latch set of the turn-button spindle locking type
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US2562016A
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Lock bolt structure
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US2627436A
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Doorknob spindle securing means
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US2542117A
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Lock knob and reversible spindle attaching means
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US2611635A
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Latch mechanism
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US2593264A
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Doorknob spindle releasing means
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US2547256A
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Nonlocking doorknob latch set
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US2622431A
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Doorknob and lock set with inaccessible fastenings
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US2547439A
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Doorknob
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US2558509A
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Auxiliary bolt deadlocking latch
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US2555316A
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Pin tumbler lock structure
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US2570765A
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Method of fitting tumbler pins
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US2503192A
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Locking cam for spring latch bolts
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CA511836A
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Latch retractor and housing therefor
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