DYER, Circuit Judge.
Waldon, Inc. brought suit against Alexander Manufacturing Co. alleging infringement of its patent, No. 3,199,236. Alexander denied infringement and counterclaimed that the patent is invalid for obviousness. The District Judge tried the case without a jury and found the patent valid but not infringed. We find the patent invalid and reverse.
The patent pertains to an attachment for farm tractors to convert them to use as earth moving bulldozers...
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