A patent for an invention may be granted only if the invention is new1. An invention2 is taken to be new if it does not form part of the state of the art3. The state of the art in the case of an invention is taken to comprise all matter (whether a product, a process, information about either, or anything else) which, at any time before the priority date4 of that invention has been made available to the public5, whether in the United Kingdom or elsewhere, by written or oral description, by use or in any other way6. In
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