(under subclass 25.1) Umbrella in which the collapsible frame consisting of a series of diagonal pairs of crossing members, each pair being pivoted together between their ends and
connected with the next pair at the ends so that the arrangements, as a whole, can be extended or retracted.
SEE OR SEARCH THIS CLASS, SUBCLASS:
145, for portable shelter framework of lazy-tong type.
SEE OR SEARCH CLASS
52, Static Structures (e.g., Buildings),
109, for static structure having lazy-tong type framework.
