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| Number | Title | Issue Date |
| 4054096 | Mobile elevationally adjustable stage The stage section comprises a pair of planar stage surface members hinged together for movement between a compact folded position, and an operative position. Pairs of main support legs are pivotally attached to each stage surface member so as to remain su... | 10/18/1977 |
| 4026221 | Multi-leg mobile folding stage An elevationally adjustable mobile folding stage includes two independent stage members pivotally connected for movement between an operational position and a folded storage position. Support legs are pivotally mounted to the two stage members and are piv... | 05/31/1977 |
