IDEAS home Printed from https://ideas.repec.org/p/hit/iirwps/06-08.html
   My bibliography  Save this paper

The structure and the evolution of essential patents for standards: Lessons from three IT standards

Author

Listed:
  • Nagaoka, Sadao
  • 長岡, 貞男
  • Shimbo, Tomoyuki
  • 真保, 智行
  • Tsukada, Naotoshi
  • 塚田, 尚稔

Abstract

This paper examines the structure and the evolution of the patents declared as essential for three major technical standards in information technology (MPEG2, DVD and W-CDMA). These standards have many essential patents, which are owned by many firms with different interests. Many patents have been applied even after the standard was set. We analyze three important reasons for why the essential patents are many and increase over time: they cover a number of different technology fields, there exist R&D competition even in a narrowly defined technology field and a firm can expand its patent portfolio by using continuations and other practices based on the priority dates of its earlier filed patent applications in the USA. Around 40% of the essential US patents for MPEG2 and DVD standards have been obtained by using these applications. However, our empirical analysis suggests that a firm with pioneering patents does not obtain more essential patents, using these practices.

Suggested Citation

  • Nagaoka, Sadao & 長岡, 貞男 & Shimbo, Tomoyuki & 真保, 智行 & Tsukada, Naotoshi & 塚田, 尚稔, 2006. "The structure and the evolution of essential patents for standards: Lessons from three IT standards," IIR Working Paper 06-08, Institute of Innovation Research, Hitotsubashi University.
    • Handle: RePEc:hit:iirwps:06-08
    as

    Download full text from publisher

    File URL: https://hermes-ir.lib.hit-u.ac.jp/hermes/ir/re/15973/070iirWP06-08.pdf
    Download Restriction: no
    ---><---

    Citations

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


    Cited by:

    1. Josh Lerner & Jean Tirole, 2015. "Standard-Essential Patents," Journal of Political Economy, University of Chicago Press, vol. 123(3), pages 547-586.
    2. TSUKADA Naotoshi & NAGAOKA Sadao, 2011. "Standards as a Knowledge Source for R&D: A first look at their incidence and impacts based on the inventor survey and patent bibliographic data," Discussion papers 11018, Research Institute of Economy, Trade and Industry (RIETI).
    3. SHIMBO Tomoyuki & NAGAOKA Sadao & TSUKADA Naotoshi, 2015. "Dynamic Effects of Patent Pools: Evidence from inter-generational competition in optical disk industry," Discussion papers 15132, Research Institute of Economy, Trade and Industry (RIETI).
    4. Nagaoka, Sadao & Motohashi, Kazuyuki & Goto, Akira, 2010. "Patent Statistics as an Innovation Indicator," Handbook of the Economics of Innovation, in: Bronwyn H. Hall & Nathan Rosenberg (ed.), Handbook of the Economics of Innovation, edition 1, volume 2, chapter 0, pages 1083-1127, Elsevier.

    More about this item

    Keywords

    standard; essential patent; continuations;
    All these keywords.

    JEL classification:

    • O31 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Innovation and Invention: Processes and Incentives
    • O34 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Intellectual Property and Intellectual Capital

    Statistics

    Access and download statistics

    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:hit:iirwps:06-08. 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.

    We have no bibliographic references for this item. You can help adding them by using 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: Digital Resources Section, Hitotsubashi University Library (email available below). General contact details of provider: https://edirc.repec.org/data/iihitjp.html .

    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.