So a patent that predates their work could, at most, frustrate them for 20 years, or two decades. I have no idea who these guys are or what patents they're refe

So a patent that predates their work could, at most, frustrate them for 20 years, or two decades. I have no idea who these guys are or what patents they're referring to, but the use of the word "decades" here is not obviously deceptive.