|
US2945267A
|
|
Closure-operators
|
|
US2832407A
|
|
Screen
|
|
US2800322A
|
|
Window operating mechanisms
|
|
US2661506A
|
|
Window structure
|
|
US2674451A
|
|
Window sash operating mechanism
|
|
US2525739A
|
|
Operating means for window structures
|
|
US2492508A
|
|
Window operating mechanism
|
|
US2054665A
|
|
Jail and prison construction
|
|
US2045424A
|
|
Speaking panel
|
|
US2070219A
|
|
Door
|
|
US2012327A
|
|
Operating and locking mechanism for cell doors
|
|
US1869786A
|
|
Window screen and support therefor
|
|
US1860968A
|
|
Shower bath construction
|
|
US1858289A
|
|
Window
|
|
US1824180A
|
|
Floor construction
|
|
US1818438A
|
|
Window
|
|
US1743294A
|
|
Indicating device
|
|
US1790733A
|
|
Window
|
|
US1734311A
|
|
Case
|
|
US1699821A
|
|
Latch
|
