the exclusive remedy of the owner, except as provided in subsection (b) of this section, is to sue the United States Government for reasonable and entire compensation for such practice or disclosure in the district court of the United States for the district in which such owner is a resident, or in the United States Court of Federal Claims, within six years after the cause of action arises. Any period during which the United States Government is in possession of a written claim under subsection (b) of this section before mailing a notice of denial of that claim does not count in computing the six years. In any such suit, the United States Government may plead any defense that may be pleaded by a private person in such an action. The last paragraph of section 1498(a) of title 28 shall apply to inventions and information covered by this section.