Annaka, Japan

Rika Hagiwara

This inventor holds 1 USPTO granted patent. Top assignee: Nobuatsu Watanabe. Active years: 1988.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Rika Hagiwara. Retrieved from https://idiyas.com/inventor/rika-hagiwara-grm1w3z2

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

% Patents Active = 100.0

Average Co-Inventor Count = 3.0

ph-index = 1

Forward Citations = 20(Granted Patents)


Company Filing History:


Years Active: 1988

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1 patent (USPTO):Explore Patents

Title: The Innovative Contributions of Rika Hagiwara in Electrochemical Technologies

Introduction: Rika Hagiwara is an inventive talent hailing from Annaka, Japan. With a keen focus on advancements in electrochemical cells, she has made significant contributions to the field of energy storage through her groundbreaking patent.

Latest Patents: Rika holds a pertinent patent titled "Method for producing graphite fluoride." This innovative method involves the production of graphite fluoride for use in electrochemical cells, specifically those with a light metal negative electrode, such as an alkali metal. The electrolyte utilized does not dissolve the negative electrode, while the positive electrode features an active material formed by fluorinating decomposition residual carbon from a covalent intercalation compound. This novel electrochemical cell boasts high discharge potential and low overvoltage, exhibiting excellent discharge characteristics, including a flat discharge voltage, substantial discharge capacity, and impressive shelf-life.

Career Highlights: Rika has worked diligently in the research and development environment at Nobuatsu Watanabe, where her innovative ideas and dedication have contributed to the advancement of energy technologies. Her focus on electrochemical applications showcases her commitment to sustainable energy solutions and innovative materials.

Collaborations: Throughout her career, Rika has collaborated with esteemed colleagues, including Nobuatsu Watanabe and Tsuyoshi Nakajima. Their combined expertise and dedication to research have fostered an inventive atmosphere, leading to significant developments in the field of electrochemical cells and beyond.

Conclusion: Rika Hagiwara stands as a prominent figure in the realm of innovation, particularly in the development of electrochemical technologies. Her patent on producing graphite fluoride exemplifies her ingenuity and commitment to enhancing energy systems. As she continues her journey in research and invention, Rika undoubtedly paves the way for future advancements in sustainable energy solutions.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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