SIBLEY, Circuit Judge.
In the district court the validity of Claim 1 of the Holmes patent No. 2,169,952 owned by appellee was held valid and infringed by a device made and used (under a junior patent) by appellant. The devices are useful mainly in mixing paints by volume so as to obtain accurately desired shades, and consist essentially of a light-transmitting rod or tube lowered into an otherwise dark container of known capacity to a measurable depth, so that the...
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