DENMAN, Circuit Judge.
Appellee Wisconsin Alumni Research Foundation brought its complaint below alleging that appellant Vitamin Technologists, Inc., and H. F. B. Roessler, one of appellant's employees, were making an infringing use of a process of producing vitamin D by activating ergosterol and yeast, claimed to be organic substances of dietary value, with the ultra violet rays of the spectrum, produced by a mercury vapor lamp, a use of the rays claimed to be in...
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