SAN FRANCISCO — An inventor found to have committed inequitable conduct before the U.S. Patent and Trademark Office has conceded that his patent case against HTC Corp. was exceptional and warrants an award of attorney fees. But his litigation counsel at Niro, Haller & Niro appear to be off the hook, at least for now.

Niro Haller partner Raymond Niro Sr. said Thursday’s order from U.S. District Judge William Hart of the Northern District of Illinois in Intellect Wireless v. HTC confirms what he has said all along: There’s “absolutely no evidence, zero, none” that anyone at his firm knew about a false declaration filed with the PTO to support Daniel Henderson’s picture phone patent.