Analysis and Assessment of Factors for Essential Patent in Patent Pools

• Project/Area Number: 25590072
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Management
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: KAJIKAWA Yuya 東京工業大学, イノベーションマネジメント研究科, 准教授 (70401148)
• Co-Investigator(Kenkyū-buntansha): MORI Junichiro 東京大学, 大学院工学系研究科, 特任講師 (30508924) ; NAKAMURA Yuko 東京大学, 総括プロジェクト機構, 特任助教 (40600698)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: パテントプール / 必須特許 / 計量書誌分析 / 知財戦略 / R&D戦略

Outline of Final Research Achievements

This study analyzed features of essential patents in patent pools. We constructed three datasets including essential patents (V), background patents (B) cited by (V), control group patents (C) citing (B). We found that average application year of (V) is older than that of (C), which indicates the advantage of prior art. But patents of (B) and (C) have less cited and more citing patents than (V) and are older than (V). These results suggest that essential patents were invented with improvement of related basic patents to adjust their standards.

Research Products

• [Presentation] Patent Pool Analysis in Bibliometrics (2014)
  • Author(s): H. Nakamura, and Y. Kajikawa
  • Organizer: 2014 Annual Meeting of Institute for Operations Research and Management Sciences (INFORMS2014)
  • Place of Presentation: San Francisco
  • Year and Date: 2014-11-09 – 2014-11-12