Adjustable-width roller shade configured to maintain...
Air control apparatus
Apparatus for controlling light and heat transference for greenh
Apparatus for detachably fastening a stretchable fabric panel to
Apparatus for securing a grille to an air conditioning unit
Banner holding device
Brake mechanism for motor driven projection screen
Closure for service opening
Conditioned air vestibule for refrigerated warehouse doorway
Control device to position projection screen for viewing
Control mechanism for positioning projection screen in closed po
Coupling structure for a screen with a fixing rod
Curtain for shrouding welding operations
Curtain for shrouding welding operations
Curtain-hook assembly
Detachable modular drive unit for projection screen apparatus
Device for attaching a cloth
Device for controlling the incidence of heat and light radiation
Double cord edge fastener
Extensible line brattice