|
US2292784A
|
|
Pivoted bolt lock
|
|
US2244152A
|
|
Key and permutation operated lock
|
|
US2357122A
|
|
Electric control device
|
|
GB546138A
|
|
Improvements in or relating to attendance-checking systems for watchmen
|
|
GB546139A
|
|
Improvements in or relating to tour keys for watchmen
|
|
US2251146A
|
|
Key operated reset for combination locks
|
|
US2248475A
|
|
Cylinder lock
|
|
US2251145A
|
|
Key and combination operated lock
|
|
US2224875A
|
|
Combination cabinet lock
|
|
US2225703A
|
|
Cylinder lock
|
|
US2220937A
|
|
Tour key for watchmen's signal systems
|
|
US2220936A
|
|
Watchman's signal and alarm system
|
|
US2155726A
|
|
Cylinder lock
|
|
US2279592A
|
|
Lock
|
|
US2123270A
|
|
Permutation lock
|
|
US2103989A
|
|
Bar lock
|
|
US2194244A
|
|
Mortise cylinder lock
|
|
US2155732A
|
|
Permutation padlock
|
|
GB447127A
|
|
Improvements in or relating to key locks
|
|
US2030837A
|
|
Lock key
|
