L. HAND, Circuit Judge.
This is the usual suit in equity upon a patent for coating electric wires; the claims are for the process and the product. For many years before March 22, 1927, when Frederickson, the patentee, filed his application, it had been the practice to cover copper wire with a coating of rubber insulation, and to cover this insulation with a braided jacket to protect it from abrasion. The result was inacceptable for some uses; the rubber would not...
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