City of Detroit v. Kahn

KNAPPEN, Circuit Judge.

This is a suit for infringement of United States patent No. 1,089,405, March 10, 1914, to Ferguson, on reinforced concrete dock or pier. The plaintiff Dock & Terminal Engineering Company has an exclusive license under the patent. The other plaintiffs are the owners thereof. This appeal is from a decree of the District Court finding the patent valid and infringed and awarding injunction and accounting.

In Detroit Iron & Steel Co. v. Carey, 236 F. 924, this court held this patent valid and infringed. That decision (which involved claims 4, 6, 10, 11, 12, and 16), if…