Date online materials using the Internet Archive

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We all know that the legal element of patent searching can add an interesting twist onto scientific and technical literature searches.   Those of us in the Intellogist community who do lots of validity investigations, for example, know that it’s not only *if* material is publicly available, but *when* it was publicly available, that counts.   Lots of folks I have talked to recommend the Wayback Machine, a.k.a. the  Internet Archive or archive.org, to provide useful evidence that web content was available online before a certain date.