On June 8, a letter signed by a bipartisan group of U.S. senators was sent to U.S. Patent and Trademark Office (USPTO) Director Kathi Vidal voicing concerns over the anti-competitive impacts of so-called “patent thickets,” especially in the drug industry. The senators’ letter urged Director Vidal to address issues of large numbers of patents granted to cover various aspects of a single pharmaceutical treatment, “primarily made up of continuation patents.” The letter, signed by Senators Patrick Leahy (D-VT), John Cornyn (R-TX), Richard Blumenthal (D-CT), Susan Collins (R-ME), Amy Klobuchar (D-MN) and Mike Braun (R-IL), advances a few claims about continuation filings that don’t come from any clear source.
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