BAILEY, Justice.
This is an action pursuant to R.S. § 4915, 35 U.S.C.A. § 63, seeking an order authorizing the Commissioner of Patents, the defendant herein, to issue letters patent to plaintiffs for their invention relating to what the plaintiffs designate as a system of musical dynamics.
This system consists essentially in the use of different colors indicating the volume of sound to be given each note in a musical composition. As, for instance...
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