The Screening Function of International Search Authorities under the Patent Cooperation Treaty: Evidence from the Japanese Government’s Policy Change in 1999

Okada, Yoshimi
WP#20-13 Hitotsubashi University IIR （2020/07/31）

This article examines the screening function of the International Search authorities, which produce International Search Reports (ISRs) for international patent applicat…

Determinants of Patent Infringement Awards in the US, Japan, and China: A Comparative Analysis

Hu, Wei : Tohru Yoshioka-Kobayashi : Toshiya Watanabe
『World Patent Information』 Volume 60 （2020/03/01）

Effects of early patent publication on knowledge dissemination: Evidence from U.S. patent law reform

Okada, Yoshimi :Sadao Nagaoka
『Information Economics and Policy』 （2020/01/25）

In order to assess effects of early publication of patent applications on the dissemination of the disclosed technological knowledge, this study examines the impacts of the 18-month pre-grant publication system introduced in the United States in 2000. It focuses on the variations of the applicant non-self-citations driven by the actual…

3. Standard Essential Patent War: Samsung vs Apple (in Korean)

Kang, Byeongwoo, 『4.0 Industry and Standardization: Case Studies』 pp. 43-62
韓国・博英社（2019/07/01）

Making the patent scope consistent with the invention: Evidence from Japan

Okada, Yoshimi : Yusuke Naito : Sadao Nagaoka
『Journal of Economics & Management Strategy』 Vol. 27 Issue 3 pp. 607-625 （2018/07/31）

It is a crucial function of patent examination to make the patent scope consistent with the contribution of the invention to the state of the art. We assess this function using newly developed data on the scope of Japanese patent applications and grants. We find that the scope was narrowed in two thirds of the grants, both the incidenc…

Contribution of Patent Examination to Making the Patent Scope Consistent with the Invention: Evidence from Japan

Okada, Yoshimi : Yusuke Naito : Sadao Nagaoka
RIETI Discussion Paper 16-E-092 Research Institute of Economy, Trade and Industry (RIETI) （2016/11/29）

Delineating the patent scope consistently with the contribution of the disclosed invention is one of the most crucial requirements for a patent system to promote innovation effectively. Given the incentive of an applicant to set a scope for the patent as broad as possible, an important task of the Patent Office is to narrow it so that …

Global spread of pharmaceutical patent protections: micro evidence from the international equivalents of the drug patents in Japan

Okada, Yoshimi : Sadao Nagaoka
WP#16-07 Hitotsubashi University IIR （2016/07/13）

We investigate the global spread of pharmaceutical patent protections as acquired by firms, based on a novel global patent database for all significant medical drugs introduced in Japan. It gives us the propensity of filing and grant rate for each country for the granted patents in Japan. Major findings are the following. Both the fili…

Effects of early patent disclosure on knowledge dissemination: evidence from the pre-grant publication system introduced in the United States

Okada, Yoshimi and Sadao Nagaoka
WP#15-12 Hitotsubashi University IIR （2015/07/10）

In order to assess the disclosure function of the patent system, this study examined the impact of the pre-grant publication system introduced in the United States in 2000. Unlike earlier studies, the applicant (inventor) non-self-citations (excluding examiner citations) were used to track knowledge flow. The causal effects of disclosu…

An Economic Analysis of Deferred Examination System: Evidence from Policy Reforms in Japan

Yamauchi, Isamu : Sadao Nagaoka
WP#14-05 Hitotsubashi University IIR （2014/06/26）

We investigate how a deferred patent examination system promotes ex-ante screening of patent applications, which reduces both the number of granted patents and the use of economic resources for examinations, without reducing the return from R&D. Based on a real option theory, we develop a model of examination request behaviors. Exploit…

Intermediary Functions and the Market for Innovation in Meiji and Taisho Japan

Nicholas, Tom: Hiroshi Shimizu
『Business History Review』 Vol.87 (Spring) pp.121-149 （2013/05/25）

Does the outsourcing of prior art search increase the efficiency of patent examination?

Yamauchi, Isamu : Sadao Nagaoka
WP#13-12 Hitotsubashi University IIR （2013/05/07）

This paper investigates the effects of outsourcing of prior art search on the efficiency of patent examination, using a large scale Japanese patent examination data. Out…