No, not as in the sense of the title to this blog, but in the sense that if someone patents ablue telephone you cannot then gain a further patent for a red one.
He also noted in apatent filing that the process allowed the blue-screen procedure to cope with glassware, cigarette smoke, blowing hair and motion blur which had all caused problems for earlier efforts.
Marked by a patently obvious blue button, the new addition serves up relevant prior art results by using key phrases from a patent's text and putting them together in a search query.