35 U.S.C. § 291 : US Code - Section 291: Interfering patents

Search 35 U.S.C. § 291 : US Code - Section 291: Interfering patents

The owner of an interfering patent may have relief against the
owner of another by civil action, and the court may adjudge the
question of the validity of any of the interfering patents, in
whole or in part. The provisions of the second paragraph of section
146 of this title shall apply to actions brought under this
section.