SAN FRANCISCO — Patent litigator Martin “Marty” Fliesler, who founded an early patent boutique that is still open today, died Friday. He was 69.

Fliesler, who co-founded San Francisco’s Fliesler Meyer in 1982, passed away after a four-month battle with Merkel cell carcinoma, a rare form of skin cancer, a death notice in the San Francisco Chronicle says. Joseph O’Malley, his partner at what’s now a seven-lawyer intellectual property firm, said Fleisler worked right up until his death.