How to Measure Patent Thickets: A Novel Approach

9 Pages Posted: 14 Jul 2009

See all articles by Georg von Graevenitz

Georg von Graevenitz

Queen Mary, School of Business and Management; Center for Competition Policy; University of Glasgow - CREATe, RCUK Centre for Copyright and New Business Models in the Creative Economy

Stefan Wagner

ESMT European School of Management and Technology

Dietmar Harhoff

Max Planck Institute for Innovation and Competition; Ludwig-Maximilians-Universität München; Centre for Economic Policy Research (CEPR)

Date Written: June 14, 2009

Abstract

The existing literature identifies patent thickets indirectly. In this paper we propose a novel measure based on patent citations which allows us to measure the density of patent thickets directly. We discuss the algorithm which generates the measure and present descriptive results validating it. Moreover, we identify technology areas which are particularly impacted by patent thickets.

Keywords: patenting, patent thickets, patent portfolio races, complexity

JEL Classification: L13, L20, O34

Suggested Citation

von Graevenitz, Georg and Wagner, Stefan and Harhoff, Dietmar, How to Measure Patent Thickets: A Novel Approach (June 14, 2009). Available at SSRN: https://ssrn.com/abstract=1434056 or http://dx.doi.org/10.2139/ssrn.1434056

Georg Von Graevenitz

Queen Mary, School of Business and Management ( email )

Mile End
London, E1 4NS
United Kingdom

Center for Competition Policy ( email )

UEA
Norwich Research Park
Norwich, Norfolk NR47TJ
United Kingdom

University of Glasgow - CREATe, RCUK Centre for Copyright and New Business Models in the Creative Economy ( email )

10 The Square, Glasgow University
Glasgow, G12 8QQ
United Kingdom

Stefan Wagner (Contact Author)

ESMT European School of Management and Technology ( email )

Schlossplatz 1
10117 Berlin
Germany

Dietmar Harhoff

Max Planck Institute for Innovation and Competition ( email )

Marstallplatz 1
Munich, Bayern 80539
Germany
+49 89 24246 550 (Phone)
+49 89 24246 599 (Fax)

HOME PAGE: http://www.ip.mpg.de

Ludwig-Maximilians-Universität München ( email )

Munich, 80539
Germany

Centre for Economic Policy Research (CEPR)

London
United Kingdom

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