The Influence of Strategic Patenting on Companies’ Patent Portfolios


Blind, Knut ; Cremers, Katrin ; Müller, Elisabeth


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URL: http://ub-madoc.bib.uni-mannheim.de/1493
URN: urn:nbn:de:bsz:180-madoc-14938
Document Type: Working paper
Year of publication: 2007
The title of a journal, publication series: None
Publication language: English
Institution: Sonstige Einrichtungen > ZEW - Leibniz-Zentrum für Europäische Wirtschaftsforschung
MADOC publication series: Veröffentlichungen des ZEW (Leibniz-Zentrum für Europäische Wirtschaftsforschung) > ZEW Discussion Papers
Subject: 330 Economics
Classification: JEL: O34 O32 ,
Subject headings (SWD): Patentanmeldung , Forschung und Entwicklung , Effizienz , Deutschland , Zitierindex
Keywords (English): strategic patenting , patent portfolio characteristics
Abstract: This paper analyses whether strategic motives for patenting influence the characteristics of companies’ patent portfolios. We use the number of citations and oppositions to represent these characteristics. The investigation is based on survey and patent data from German companies. We find clear evidence that the companies’ patenting strategies explain the characteristics of their patent portfolios. First, companies using patents to protect their technological knowledge base receive a higher number of citations for their patents. Second, the motive of offensive – but not of defensive – blocking is related to a higher incidence of oppositions, whereas companies using patents as bartering chips in collaborations receive fewer oppositions to their patents.
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