WISDOM, Senior Circuit Judge.
This is a patent infringement suit. After trial the district court found the plaintiff's patent invalid for obviousness and entered judgment for the defendants. We reverse.
The patent in question is No. 3,522,754, issued to Louis E. Sauer and entitled "Reinforced Freewheeling Resilient Cover for Rotary Die-Cutting Anvil". It describes a device used in making corrugated containers — cardboard boxes, in plain words. The first...
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