The Federal Circuit has issued a decision that provides guidance in determining co-inventor status in patent disputes.  Tavory v. NTP, Inc., No. 07-1527. In an extensive discussion on inventorship, the Federal Circuit has held that an inventor must have conceived a portion of the invention, but does not have to be skilled in the art and able to reduce the invention to practice in order to be considered an inventor.  To read the decision, click here.