“Working of the patented invention for experimental or research purposes” (Article 69-1 of the Patent Act)
(Conclusion)
“Working of the patented invention for experimental or research purposes” (Article 69-1 of the Patent Act) is admitted–Patentee lost
A case in which the Tokyo District Court found to the effect that experiments or research conducted to obtain marketing approval for a new (original) medicinal product also correspond to the “working of the patented invention for experimental or research purposes” set forth in Article 69, Paragraph 1 of the Patent Act. The right of a prior user was acknowledged.
<Writer: Hideki Takaishi (Attorney-at-law licensed in Japan and California)>
https://www.ip.courts.go.jp/app/files/hanrei_en/992/002992.pdf