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Another Bodleian Libguide - written by colleague in the RSL - will help with technicalities of getting patents.
The Law Bod now has some material from the former Oxford Intellectual Property Research Centre (OIPRC), which had previously been based at St Peter's College.
This collection can be found in the rolling cases on Floor 0. It is an "historic" non-growing collection. It is discoverable by normal SOLO searches