US PATENT SUBCLASS 49 / 252
.~.~.~ Guide on portal frame

Current as of: June, 1999
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49 /   HD   MOVABLE OR REMOVABLE CLOSURES

208  DF  MOUNTED FOR MULTIDIRECTIONAL OR OBLIQUE MOVEMENT {7}
246  DF  .~ Swings on plural axes; e.g., pivotal link arms {4}
250  DF  .~.~ With additional slide guiding closure movement {2}
252.~.~.~ Guide on portal frame

DEFINITION

Classification: 49/252

(under subclass 250) Device wherein the closure opening is formed by surrounding frame members and wherein the closure guideway is mounted on the frame.

SEE OR SEARCH THIS CLASS, SUBCLASS:

81, for a similar structure which mounts interconnected louvers for concurrent multidirectional movement.