(under subclass 19) Combinations in which the hood, canopy shield, storage chamber, outrigged rigid panel, or some combined part, is so constructed that all or part of the device may be changed in size by other than motion to or from operative positions.
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39, for such devices when only the structure of the hood, canopy, shield or storage chamber is claimed with no features of the flexible or portable panel or its supporting means are recited.
64, for other changeable size devices in the class, and see the notes thereunder.
