SOMERVILLE, Mass. /ScoopCloud/ -- Patent Bots today announced its Patent Law Firm Quality Scores, a new ranking of 802 U.S. patent law firms with at least 50 issued patents for the year ending March 31, 2020. Patent Bots downloaded 310,842 publicly available patents from the United States Patent and Trademark Office and then used the company's AI-powered, automated patent proofreading tool to count the number of errors in each issued patent.