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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.

(This abstract was borrowed from another version of this item.)

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Bibliographic Info

Paper provided by ULB -- Universite Libre de Bruxelles in its series ULB Institutional Repository with number 2013/6383.

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Date of creation: 2008
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Publication status: Published in: Scientometrics (2008) v.75 n° 2,p.319-338
Handle: RePEc:ulb:ulbeco:2013/6383

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  1. 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.
  2. Pakes, Ariel S, 1986. "Patents as Options: Some Estimates of the Value of Holding European Patent Stocks," Econometrica, Econometric Society, vol. 54(4), pages 755-84, July.
  3. Bruno Van Pottelsberghe & Didier François, 2009. "The cost factor in patent systems," ULB Institutional Repository 2013/13422, ULB -- Universite Libre de Bruxelles.
  4. 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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  7. 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.
  8. Bruno Van Pottelsberghe & Eleftherios Sapsalis, 2007. "The institutional sources of knowledge and the value of academic patents," ULB Institutional Repository 2013/6195, ULB -- Universite Libre de Bruxelles.
  9. Eugenio Archontopoulos & Dominique Guellec & Niels Stevnsborg & Bruno Van Pottelsberghe & Nicolas van Zeebroeck, 2007. "When small is beautiful: measuring the evolution and consequences of the voluminosity of patent applications at the EPO," ULB Institutional Repository 2013/6191, ULB -- Universite Libre de Bruxelles.
  10. Dominique Guellec & Bruno Van Pottelsberghe & Nicolas van Zeebroeck, 2007. "Patent as a market instrument," ULB Institutional Repository 2013/60728, ULB -- Universite Libre de Bruxelles.
  11. Jean Olson Lanjouw, 1993. "Patent Protection: Of What Value and for How Long?," NBER Working Papers 4475, National Bureau of Economic Research, Inc.
  12. 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.
  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. 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.
  15. 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.
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