California Mesothelioma Law Firm Website Updates Make Navigation Easier for Clients Clapper, Patti, Schweizer & Mason (CPSM), leading plaintiff's law firm in California, recently launched the redesign of their website dedicated to helping those diagnosed with mesothelioma, a rare and aggressive cancer caused by exposure to asbestos.(PRWEB) October 03, 2012 Clapper, Patti, Schweizer & Mason is pleased to welcome visitors to our newly redesigned website. ... [News Source]