|
US3908310A
|
|
Canopy door
|
|
US3581437A
|
|
Aircraft hangar door
|
|
US3579910A
|
|
Locking means for a vertically movable door
|
|
US3418775A
|
|
Door construction
|
|
US3413757A
|
|
Canopy door
|
|
US3370381A
|
|
Operating mechanism for a hinged door
|
|
US3276165A
|
|
Vertical lift door safety latch
|
|
US3172506A
|
|
Leaf construction
|
|
US3151349A
|
|
Top roller assembly
|
|
US3151858A
|
|
Turn-over door
|
|
US3099338A
|
|
Door operator
|
|
US3204269A
|
|
Bridge
|
|
US3159728A
|
|
Safety edge for power-operated door
|
|
US2987144A
|
|
Brake for door track roller
|
|
US2869862A
|
|
Cable operated system for a hinged door
|
|
US2739645A
|
|
Aircraft hangar door
|
|
US2838302A
|
|
Vertical lift canopy door
|
|
US2766859A
|
|
Roof hatch
|
|
US2896558A
|
|
Roof hatch
|
|
US2841390A
|
|
Operating system for multi-leaf doors
|
