How to Make an Obviousness Determination March 29, 2006Patentmotivation to combine, obviousness, paidDennis Crouch In re Kahn (Fed. Cir. 2006, 04–1616). I already provided a summary of this March 22, 2006 opinion, but decided that the meat of the opinion is important enough to be repeated: To continue reading, become a Patently-O member. Already a member? Simply log in to access the full post. Login