對於疲於應付NPE的企業來說,35 USC § 299 Joinder of parties 至少讓企業主看到了一線生機,至少今後有更多的機會和理由撤銷訴訟。依據新法規定,NPE需要證明 (1) any right to relief is asserted against the parties jointly, severally, or in the alternative with respect to or arising out of the same transaction, occurrence, or series of transactions or occurrences relating to the making, using, importing into the United States, offering for sale, or selling of the same accused product or process; and (2) questions of fact common to all defendants or counterclaim defendants will arise in the action. 過去,動輒以相同的專利同時控訴數十位被告,而被告之被控侵權品間可能毫無關連的情況,藉由此次專利法變革應可望獲得改善,而NPE的訴訟成本也可能因此提高。