GRIFFIN B. BELL, Circuit Judge.
Suit for infringement of United States Letters patent No. 2,438,173 relating to portable, collapsible scaffolding units was brought against Safway Products, Inc., a distributor of the accused Aldek Scaffold. R. D. Werner Co., Inc., the manufacturer of the Aldek scaffold, was permitted to intervene. The charge of infringement was limited to claims 1 and 2 of the patent in suit.
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