IDEAS home Printed from https://ideas.repec.org/a/eee/pubeco/v148y2017icp43-56.html
   My bibliography  Save this article

Why weak patents? Testing the examiner ignorance hypothesis

Author

Listed:
  • Lei, Zhen
  • Wright, Brian D.

Abstract

There is a widespread impression, reflected in recent legislation, that US Patent Office examiners issue many patents of dubious validity, and are insufficiently informed to distinguish these from other valid applications. We address this issue using related application outcomes at the European Patent Office as indicators for patent weakness. We create a proxy for potentially citable prior art using latent semantic analysis of US patent documents, and use this to construct a measure of examiner search effort. We find that US examiners tend to devote more search effort to weaker patents, implying that they can identify a substantial portion of the weak patents that they issue. Why the patent system fails to make better use of examiners' ability to identify weak patents is a question that merits further investigation.

Suggested Citation

  • Lei, Zhen & Wright, Brian D., 2017. "Why weak patents? Testing the examiner ignorance hypothesis," Journal of Public Economics, Elsevier, vol. 148(C), pages 43-56.
    • Handle: RePEc:eee:pubeco:v:148:y:2017:i:c:p:43-56
    DOI: 10.1016/j.jpubeco.2017.02.004
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0047272717300178
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.jpubeco.2017.02.004?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Mark A. Lemley & Carl Shapiro, 2005. "Probabilistic Patents," Journal of Economic Perspectives, American Economic Association, vol. 19(2), pages 75-98, Spring.
    2. Graham, Stuart J. H. & Hall, Bronwyn H. & Harhoff, Dietmar & Mowery, David C., 2002. "Post-Issue Patent "Quality Control": A Comparative Study of US Patent Re-Examinations and European Patent Oppositions," Department of Economics, Working Paper Series qt2qt097bd, Department of Economics, Institute for Business and Economic Research, UC Berkeley.
    3. Mark A. Lemley, 2012. "Fixing the Patent Office," NBER Working Papers 18081, National Bureau of Economic Research, Inc.
    4. Ryan Lampe, 2012. "Strategic Citation," The Review of Economics and Statistics, MIT Press, vol. 94(1), pages 320-333, February.
    5. Mark A. Lemley & Bhaven Sampat, 2012. "Examiner Characteristics and Patent Office Outcomes," The Review of Economics and Statistics, MIT Press, vol. 94(3), pages 817-827, August.
    6. Alcácer, Juan & Gittelman, Michelle & Sampat, Bhaven, 2009. "Applicant and examiner citations in U.S. patents: An overview and analysis," Research Policy, Elsevier, vol. 38(2), pages 415-427, March.
    7. Mark A. Lemley, 2012. "Fixing the Patent Office," NBER Chapters, in: Innovation Policy and the Economy, Volume 13, pages 83-99, National Bureau of Economic Research, Inc.
    8. Bronwyn H. Hall & Adam B. Jaffe & Manuel Trajtenberg, 2001. "The NBER Patent Citation Data File: Lessons, Insights and Methodological Tools," NBER Working Papers 8498, National Bureau of Economic Research, Inc.
    9. Jay Pil Choi, 2005. "Live and Let Live: A Tale of Weak Patents," Journal of the European Economic Association, MIT Press, vol. 3(2-3), pages 724-733, 04/05.
    10. Alfons Palangkaraya & Elizabeth Webster & Paul H. Jensen, 2011. "Misclassification between Patent Offices: Evidence from a Matched Sample of Patent Applications," The Review of Economics and Statistics, MIT Press, vol. 93(3), pages 1063-1075, August.
    11. Florian Schuett, 2013. "Patent quality and incentives at the patent office," RAND Journal of Economics, RAND Corporation, vol. 44(2), pages 313-336, June.
    12. Pierre Régibeau & Katharine Rockett, 2010. "Innovation Cycles And Learning At The Patent Office: Does The Early Patent Get The Delay?," Journal of Industrial Economics, Wiley Blackwell, vol. 58(2), pages 222-246, June.
    13. Picard, Pierre M. & van Pottelsberghe de la Potterie, Bruno, 2013. "Patent office governance and patent examination quality," Journal of Public Economics, Elsevier, vol. 104(C), pages 14-25.
    14. Bhaven N. Sampat, 2010. "When Do Applicants Search for Prior Art?," Journal of Law and Economics, University of Chicago Press, vol. 53(2), pages 399-416, May.
    15. Joseph Farrell & Carl Shapiro, 2008. "How Strong Are Weak Patents?," American Economic Review, American Economic Association, vol. 98(4), pages 1347-1369, September.
    16. Deepak Hegde & David C. Mowery & Stuart J. H. Graham, 2009. "Pioneering Inventors or Thicket Builders: Which U.S. Firms Use Continuations in Patenting?," Management Science, INFORMS, vol. 55(7), pages 1214-1226, July.
    17. Dietmar Harhoff & Stefan Wagner, 2009. "The Duration of Patent Examination at the European Patent Office," Management Science, INFORMS, vol. 55(12), pages 1969-1984, December.
    18. Cotropia, Christopher A. & Lemley, Mark A. & Sampat, Bhaven, 2013. "Do applicant patent citations matter?," Research Policy, Elsevier, vol. 42(4), pages 844-854.
    19. James Bessen & Michael J. Meurer, 2008. "Introduction to Patent Failure: How Judges, Bureaucrats, and Lawyers Put Innovators at Risk," Introductory Chapters, in: Patent Failure: How Judges, Bureaucrats, and Lawyers Put Innovators at Risk, Princeton University Press.
    20. Ronald J. Mann & Marian Underweiser, 2012. "A New Look at Patent Quality: Relating Patent Prosecution to Validity," Journal of Empirical Legal Studies, John Wiley & Sons, vol. 9(1), pages 1-32, March.
    21. Michael D. Frakes & Melissa F. Wasserman, 2014. "The Failed Promise of User Fees: Empirical Evidence from the U.S. Patent and Trademark Office," Journal of Empirical Legal Studies, John Wiley & Sons, vol. 11(4), pages 602-636, December.
    22. Mark A. Lemley, 2012. "Fixing the Patent Office," Discussion Papers 11-014, Stanford Institute for Economic Policy Research.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Frakes, Michael D. & Wasserman, Melissa F., 2020. "Procrastination at the Patent Office?," Journal of Public Economics, Elsevier, vol. 183(C).
    2. Jonathan H. Ashtor, 2019. "Investigating Cohort Similarity as an Ex Ante Alternative to Patent Forward Citations," Journal of Empirical Legal Studies, John Wiley & Sons, vol. 16(4), pages 848-880, December.
    3. Drivas, Kyriakos & Kaplanis, Ioannis, 2020. "The role of international collaborations in securing the patent grant," Journal of Informetrics, Elsevier, vol. 14(4).
    4. Corinne Langinier & Philippe Marcoul, 2019. "Subjective performance of patent examiners, implicit contracts, and self‐funded patent offices," Managerial and Decision Economics, John Wiley & Sons, Ltd., vol. 40(3), pages 251-266, April.
    5. deGrazia, Charles A.W. & Pairolero, Nicholas A. & Teodorescu, Mike H.M., 2021. "Examination incentives, learning, and patent office outcomes: The use of examiner’s amendments at the USPTO," Research Policy, Elsevier, vol. 50(10).
    6. Gaétan de Rassenfosse & William E. Griffiths & Adam B. Jaffe & Elizabeth Webster, 2021. "Low-Quality Patents in the Eye of the Beholder: Evidence from Multiple Examiners," The Journal of Law, Economics, and Organization, Oxford University Press, vol. 37(3), pages 607-636.
    7. Ronald B. Davies & Dieter Franz Kogler & Ryan M. Hynes, 2020. "Patent Boxes and the Success Rate of Applications," Working Papers 202018, School of Economics, University College Dublin.
    8. Drivas, Kyriakos & Lei, Zhen & Wright, Brian D., 2017. "Academic patent licenses: Roadblocks or signposts for nonlicensee cumulative innovation?," Journal of Economic Behavior & Organization, Elsevier, vol. 137(C), pages 282-303.
    9. Pierre Cotterlaz, 2021. "Three essays on spatial frictions [Trois essais sur les frictions spatiales]," SciencePo Working papers Main tel-03436173, HAL.
    10. Zhao, Long, 2022. "On the grant rate of Patent Cooperation Treaty applications: Theory and evidence," Economic Modelling, Elsevier, vol. 117(C).
    11. Bekkers, Rudi & Martinelli, Arianna & Tamagni, Federico, 2020. "The impact of including standards-related documentation in patent prior art: Evidence from an EPO policy change," Research Policy, Elsevier, vol. 49(7).
    12. Bojan Ćudić, 2021. "Factors impacting patent applications in European countries," Regional Science Policy & Practice, Wiley Blackwell, vol. 13(3), pages 573-589, June.
    13. Pierre Cotterlaz, 2021. "Three essays on spatial frictions [Trois essais sur les frictions spatiales]," SciencePo Working papers tel-03436173, HAL.
    14. Michael D. Frakes & Melissa F. Wasserman, 2020. "Investing in Ex Ante Regulation: Evidence from Pharmaceutical Patent Examination," NBER Working Papers 27579, National Bureau of Economic Research, Inc.
    15. Frakes, Michael D. & Wasserman, Melissa F., 2021. "Knowledge spillovers, peer effects, and telecommuting: Evidence from the U.S. Patent Office," Journal of Public Economics, Elsevier, vol. 198(C).
    16. Sun, Zhen & Wright, Brian D., 2022. "Citations backward and forward: Insights into the patent examiner's role," Research Policy, Elsevier, vol. 51(7).
    17. Michael D. Frakes & Melissa F. Wasserman, 2024. "Deadlines Versus Continuous Incentives: Evidence from the Patent Office," NBER Working Papers 32066, National Bureau of Economic Research, Inc.
    18. Kwon, Seokbeom, 2021. "The prevalence of weak patents in the United States: A new method to identify weak patents and the implications for patent policy," Technology in Society, Elsevier, vol. 64(C).
    19. Arora, Ashish & Cohen, Wesley & Lee, Honggi & Sebastian, Divya, 2023. "Invention value, inventive capability and the large firm advantage," Research Policy, Elsevier, vol. 52(1).
    20. Nagaoka, Sadao & Yamauchi, Isamu, 2022. "Information constraints and examination quality in patent offices: The effect of initiation lags," International Journal of Industrial Organization, Elsevier, vol. 82(C).
    21. Arts, Sam & Hou, Jianan & Gomez, Juan Carlos, 2021. "Natural language processing to identify the creation and impact of new technologies in patent text: Code, data, and new measures," Research Policy, Elsevier, vol. 50(2).
    22. Kim, Yee Kyoung & Oh, Jun Byoung, 2017. "Examination workloads, grant decision bias and examination quality of patent office," Research Policy, Elsevier, vol. 46(5), pages 1005-1019.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Andrew Eckert & Corinne Langinier, 2014. "A Survey Of The Economics Of Patent Systems And Procedures," Journal of Economic Surveys, Wiley Blackwell, vol. 28(5), pages 996-1015, December.
    2. Kwon, Seokbeom, 2021. "The prevalence of weak patents in the United States: A new method to identify weak patents and the implications for patent policy," Technology in Society, Elsevier, vol. 64(C).
    3. deGrazia, Charles A.W. & Pairolero, Nicholas A. & Teodorescu, Mike H.M., 2021. "Examination incentives, learning, and patent office outcomes: The use of examiner’s amendments at the USPTO," Research Policy, Elsevier, vol. 50(10).
    4. Adam B. Jaffe & Gaétan de Rassenfosse, 2017. "Patent citation data in social science research: Overview and best practices," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 68(6), pages 1360-1374, June.
    5. Higham, Kyle & de Rassenfosse, Gaétan & Jaffe, Adam B., 2021. "Patent Quality: Towards a Systematic Framework for Analysis and Measurement," Research Policy, Elsevier, vol. 50(4).
    6. NAGAOKA Sadao & YAMAUCHI Isamu, 2017. "Information Constraint of the Patent Office and Examination Quality: Evidence from the effects of initiation lags," Discussion papers 17040, Research Institute of Economy, Trade and Industry (RIETI).
    7. Gaétan de Rassenfosse & William E. Griffiths & Adam B. Jaffe & Elizabeth Webster, 2021. "Low-Quality Patents in the Eye of the Beholder: Evidence from Multiple Examiners," The Journal of Law, Economics, and Organization, Oxford University Press, vol. 37(3), pages 607-636.
    8. OKADA Yoshimi & NAITO Yusuke & NAGAOKA Sadao, 2016. "Contribution of Patent Examination to Making the Patent Scope Consistent with the Invention: Evidence from Japan," Discussion papers 16092, Research Institute of Economy, Trade and Industry (RIETI).
    9. Corinne Langinier & Stéphanie Lluis, 2021. "Departure And Promotion Of U.S. Patent Examiners: Do Patent Characteristics Matter?," Contemporary Economic Policy, Western Economic Association International, vol. 39(2), pages 416-434, April.
    10. Yoshimi Okada & Yusuke Naito & Sadao Nagaoka, 2018. "Making the patent scope consistent with the invention: Evidence from Japan," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 27(3), pages 607-625, September.
    11. Sun, Zhen & Wright, Brian D., 2022. "Citations backward and forward: Insights into the patent examiner's role," Research Policy, Elsevier, vol. 51(7).
    12. Natarajan Balasubramanian & Jeongsik Lee & Jagadeesh Sivadasan, 2018. "Deadlines, Workflows, Task Sorting, and Work Quality," Management Science, INFORMS, vol. 64(4), pages 1804-1824, April.
    13. Kim, Yee Kyoung & Oh, Jun Byoung, 2017. "Examination workloads, grant decision bias and examination quality of patent office," Research Policy, Elsevier, vol. 46(5), pages 1005-1019.
    14. Florian Schuett, 2013. "Inventors and Impostors: An Analysis of Patent Examination with Self-Selection of Firms into R&D," Journal of Industrial Economics, Wiley Blackwell, vol. 61(3), pages 660-699, September.
    15. Bekkers, Rudi & Martinelli, Arianna & Tamagni, Federico, 2020. "The impact of including standards-related documentation in patent prior art: Evidence from an EPO policy change," Research Policy, Elsevier, vol. 49(7).
    16. Benjamin Barber & Luis Diestre, 2022. "Can firms avoid tough patent examiners through examiner‐shopping? Strategic timing of citations in USPTO patent applications," Strategic Management Journal, Wiley Blackwell, vol. 43(9), pages 1854-1871, September.
    17. Kenneth Zahringer & Christos Kolympiris & Nicholas Kalaitzandonakes, 2018. "Time to patent at the USPTO: the case of emerging entrepreneurial firms," The Journal of Technology Transfer, Springer, vol. 43(4), pages 923-952, August.
    18. Gaétan de Rassenfosse & Adam B. Jaffe, 2018. "Are patent fees effective at weeding out low‐quality patents?," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 27(1), pages 134-148, March.
    19. Nagaoka, Sadao & Yamauchi, Isamu, 2022. "Information constraints and examination quality in patent offices: The effect of initiation lags," International Journal of Industrial Organization, Elsevier, vol. 82(C).
    20. Lei, Zhen & Wright, Brian D., 2009. "Why weak patents? Rational ignorance or pro-"customer" Tilt?," 2009 Annual Meeting, July 26-28, 2009, Milwaukee, Wisconsin 49279, Agricultural and Applied Economics Association.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:pubeco:v:148:y:2017:i:c:p:43-56. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.elsevier.com/locate/inca/505578 .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.