"The radio craze will die out in time."
Thomas Edison ; 1922
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| Number | Title | Issue Date |
| 4425741 | Collapsible structure A structure that is collapsible from a volume-enclosing, expanded position to a position wherein the walls and roof are disposed in a horizontally extending stack of generally vertically disposed members. The roof is pivotally mounted to an upper portion ... | 01/17/1984 |
| 4122638 | Folding structures considered to be primarily useful for play purposes Folding structures useful for a variety of different utilitarian and play purposes can be constructed so as to utilize a Sarrus linkage modified so as to include an overcenter toggle mechanism to reinforce the linkage against inadvertent or undesired fold... | 10/31/1978 |
| 4112635 | Child's playhouse type collapsible structure A child's playhouse, or the like, particularly designed and constructed for being folded into a compact storage position when not in use and readily expandable to a complete playhouse type structure when in use. The structure may be permanently mounted on... | 09/12/1978 |