“ In general terms, the Kansas statute which the court now upholds compels one selling a patent right in any county of the state of Kansas to file with the clerk of such county an authenticated copy of the patent, together with an affidavit as to the genuineness of the patent, and as to other matters. The statute, moreover, exacts that where a note is given for the purchase price of a patent right, there shall be inserted in the note a statement that it is given for a patent right, presumably to deprive the note of the attributes of commercial paper. ”