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令和7年(行ケ)第10023号 予測することができなかった効果

29/5/2026

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令和7年(行ケ)第10023号審決取消請求事件(令和8年4月16日判決言渡)は、発明の名称を「熱可塑性樹脂組成物とそれを用いた樹脂成型品および偏光子保護フィルムならびに樹脂成形品の製造方法」とする発明についての特許無効審判請求を不成立とした審決の取消訴訟で、当業者は主引用発明及び文献に記載された技術的事項に基づき、特許発明と主引用発明との相違点に係る構成を採用することを容易に想到することができたものといえ、かつ、当該特許発明は、その構成が奏するものとして当業者が予測することができなかった効果を奏しているとは認められないとして、特許無効審判請求を不成立とした審決を取り消した事例です。
生成AIに本判決の評釈をさせました。大きな誤りはないように思えます。ただ、生成AIによる調査・分析結果は、公開された情報からだけの分析であり、必ずしも実情を示したものではないこと、誤った情報も含まれていることについてはご留意されたうえで、ご参照ください。
 
令和7年(行ケ)第10023号 審決取消請求事件 判 決
https://www.courts.go.jp/assets/hanrei/hanrei-pdf-95902.pdf
 
 
Reiwa 7 (Gyo-ke) No. 10023 — Effect That Could Not Have Been Predicted
Reiwa 7 (Gyo-ke) No. 10023, a case seeking rescission of a trial decision (judgment rendered on April 16, Reiwa 8), concerned a request for a patent invalidation trial regarding an invention entitled “Thermoplastic Resin Composition, Resin Molded Article and Polarizer Protective Film Using the Same, and Method for Manufacturing a Resin Molded Article.”
In this case, the court held that a person skilled in the art could have easily conceived of adopting the configuration relating to the differences between the patented invention and the primary cited invention, based on the primary cited invention and the technical matters described in the cited documents. The court also found that the patented invention could not be recognized as producing an effect that a person skilled in the art could not have predicted as resulting from its configuration. Accordingly, the court revoked the trial decision that had found the request for a patent invalidation trial to be groundless.
I asked generative AI to provide a commentary on this judgment. I believe there are no major errors. However, please note when referring to the results of the investigation and analysis by generative AI that they are based solely on publicly available information, do not necessarily reflect the actual circumstances, and may contain inaccurate information.

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