MARTIN, Chief Justice.
This is an appeal from a decision of the Commissioner of Patents, rejecting claims 1, 2, 3, 4, 8, and 9 of appellant's application for a patent.
The invention in question relates to the side bearings for railroad cars, which are interposed between the bolster on the truck and the body bolster to which the car body is affixed. At each end of the truck-bolster
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