Air seal
Automatic closure
Automatic door closure for double-acting doors
Balanced door closing apparatus
Damped one-way self-closing gate
Door assembly
Electrical swing gate
Gate hinge and lubricating means therefor
Gate hinge composition
Gate opening and closing system
Gate opening device
Heavy duty constant use self closing gate
Motorized pivoting gate with vertical lifting
Multi-panel closures
Remotely operated gate structure
Self-closing gate
Self-closing gate
Swing away manway assembly
Swing doors
Vehicle-operated gate