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A brief history of space and time: the scope-year index as a patent value indicator based on families and renewals

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  • Bruno Van Pottelsberghe
  • Nicolas van Zeebroeck

Abstract

The renewal of patents and their geographical scope for protection constitute two essential dimensions in a patent’s life, and probably the most frequently used patent value indicators. The intertwining of these dimensions (the geographical scope of protection may vary over time) makes their analysis complex, as any measure along one dimension requires an arbitrary choice on the second. This paper proposes a new indicator of patent value, the Scope-Year index, combining the two dimensions. The index is computed for patents filed at the EPO from 1980 to 1996 and validated in its member states. It shows that the average value of patent filings has increased in the early eighties but has constantly decreased from the mid-eighties until the mid nineties, despite the institutional expansion of the EPO. This result sheds a new and worrying light on the worldwide boom in patent filings.

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File URL: https://dipot.ulb.ac.be/dspace/bitstream/2013/6295/1/bvp-0057.pdf
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Bibliographic Info

Paper provided by ULB -- Universite Libre de Bruxelles in its series Working Papers CEB with number 07-019.RS.

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Length: 19 p.
Date of creation: Jun 2007
Date of revision:
Publication status: Published by: Centre Emile Bernheim, Bruxelles
Handle: RePEc:sol:wpaper:07-019

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Keywords: Patent value; geographical scope; renewals; patent statistics; patent families.;

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  1. Eleftherios Sapsalis & Bruno van Pottelsberghe de la Potterie, 2007. "The Institutional Sources Of Knowledge And The Value Of Academic Patents," Economics of Innovation and New Technology, Taylor & Francis Journals, vol. 16(2), pages 139-157.
  2. Guellec, Dominique & Pottelsberghe de la Potterie, Bruno v., 2000. "Applications, grants and the value of patent," Economics Letters, Elsevier, vol. 69(1), pages 109-114, October.
  3. Deng, Yi, 2007. "The effects of patent regime changes: A case study of the European patent office," International Journal of Industrial Organization, Elsevier, vol. 25(1), pages 121-138, February.
  4. Ariel Pakes, 1986. "Patents as Options: Some Estimates of the Value of Holding European Patent Stocks," NBER Working Papers 1340, National Bureau of Economic Research, Inc.
  5. Dominique Guellec & Bruno Van Pottelsberghe & Nicolas van Zeebroeck, 2007. "Patent as a market instrument," ULB Institutional Repository 2013/60728, ULB -- Universite Libre de Bruxelles.
  6. Francois, Didier & van Pottelsberghe, Bruno, 2006. "The Cost Factor in Patent Systems," CEPR Discussion Papers 5944, C.E.P.R. Discussion Papers.
  7. Jean Olson Lanjouw, 1993. "Patent Protection: Of What Value and for How Long?," NBER Working Papers 4475, National Bureau of Economic Research, Inc.
  8. Archontopoulos, Eugenio & Guellec, Dominique & Stevnsborg, Niels & van Pottelsberghe de la Potterie, Bruno & van Zeebroeck, Nicolas, 2007. "When small is beautiful: Measuring the evolution and consequences of the voluminosity of patent applications at the EPO," Information Economics and Policy, Elsevier, vol. 19(2), pages 103-132, June.
  9. Ariel Pakes & Mark Schankerman, 1979. "The Rate of Obsolescence Of Knowledge, Research Gestation Lags, and the Private Rate of Return to Research Resources," NBER Working Papers 0346, National Bureau of Economic Research, Inc.
  10. Dietmar Harhoff & Francis Narin & F. M. Scherer & Katrin Vopel, 1999. "Citation Frequency And The Value Of Patented Inventions," The Review of Economics and Statistics, MIT Press, vol. 81(3), pages 511-515, August.
  11. Jean O. Lanjouw & Mark Schankerman, 1997. "Stylized Facts of Patent Litigation: Value, Scope and Ownership," NBER Working Papers 6297, National Bureau of Economic Research, Inc.
  12. Bruno Van Pottelsberghe & Dominique Guellec, 2002. "The value of patents and patenting strategies: countries and technology areas patterns," ULB Institutional Repository 2013/6217, ULB -- Universite Libre de Bruxelles.
  13. Reitzig, Markus, 2004. "Improving patent valuations for management purposes--validating new indicators by analyzing application rationales," Research Policy, Elsevier, vol. 33(6-7), pages 939-957, September.
  14. Jean O. Lanjouw & Mark Schankerman, 1999. "The Quality of Ideas: Measuring Innovation with Multiple Indicators," NBER Working Papers 7345, National Bureau of Economic Research, Inc.
  15. Mark Schankerman, 1998. "How Valuable is Patent Protection? Estimates by Technology Field," RAND Journal of Economics, The RAND Corporation, vol. 29(1), pages 77-107, Spring.
  16. Jean O. Lanjouw & Ariel Pakes & Jonathan Putnam, 1996. "How to Count Patents and Value Intellectual Property: Uses of Patent Renewal and Application Data," NBER Working Papers 5741, National Bureau of Economic Research, Inc.
  17. Harhoff, Dietmar & Scherer, Frederic M. & Vopel, Katrin, 2003. "Citations, family size, opposition and the value of patent rights," Research Policy, Elsevier, vol. 32(8), pages 1343-1363, September.
  18. Kortum, Samuel & Lerner, Josh, 1999. "What is behind the recent surge in patenting?1," Research Policy, Elsevier, vol. 28(1), pages 1-22, January.
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