.~ Closures on opposite or angularly related barriers
DEFINITION
Classification: 49/94
(under subclass 73) Device provided with opposite or converging passage-blocking surfaces, e.g., wall and roof, each having an opening, and wherein a concurrently movable closure is mounted in an opening on each surface.
SEE OR SEARCH THIS CLASS, SUBCLASS:
36, for a continuous opening in converging passage blocking surfaces, and having either a concurrently movable closure for each surface opening or a single closure for the entire opening.
