SWAN, Circuit Judge.
This appeal questions only the validity of the patents in suit, the appellants contending that neither patent discloses invention but merely ordinary mechanical skill. The patents relate to a certain type of metal strip used in terrazzo floors. It is known as "heavy top" terrazzo strip, and consists of a thin, metal base strip of familiar type which is fastened to a thicker, metal top bar; the latter being rabbeted along one side to receive the...
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