Guidet v. City of Brooklyn

12 F. 223

Opinion

Mr. Chief Justice Waite

delivering the opinion of tho court affirming the decree.

Where it was shown" that if stone were used with rougher side surfaces than those found in old pavements, and that all artificial means of keeping tho transverse joints open might be abandoned and the requisite surface secured, it was simply carrying forward an old idea, and doing what had been substantially done before, but with better results. Such a change is only in degree, and is not patentable.