Report:Delphion/Data Coverage/Non Patent Coverage/Databases Accessed/IBM Technical Disclosure Bulletin
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|DWPI on Delphion is no longer available, as of March 31, 2012. DWPI data is available on the Thomson Innovation platform.|
IBM Technical Disclosure Bulletin (TDB)
This is the only resource that Delphion can offer which does not require a separate subscription to another database to see the document text in full. According to Delphion’s introduction, “The IBM Technical Disclosure Bulletin (TDB) was published from 1958 until January 1998 as a forum for IBM employees to publish defensive disclosures of inventions. Over 48,000 references to TDB articles are made in U.S. patents.” Each time a citation to a TDB article is found in a US patent, Delphion provides a link to that reference.
One issue with the TDB collection on Delphion is that the original document images are not available. In the case of some documents which refer to drawings in the specification, this can result in a loss of clarity for the inventive concept. The figure below shows an example of a disclosure without a necessary accompanying figure. By contrast, the defensive publication database IP.com, which also contains the technical disclosure bulletins, does contain the complete image for many of the documents in its collection. The two figures below highlight the difference in a Delphion record (free with Delphion subscription) vs. an IP.com record (separate subscription required).