Fukuyama, Japan

Hisami Tokunaga

This inventor holds 1 USPTO granted patent. Top assignees: Nippon Kokan Kabushiki Kaisha, Osaka Oxygen Industries, Ltd.. Active years: 1979.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hisami Tokunaga. Retrieved from https://idiyas.com/inventor/hisami-tokunaga

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


% Patents Active = 100.0

Average Co-Inventor Count = 5.0

ph-index = 1

Forward Citations = 5(Granted Patents)


Company Filing History:


Years Active: 1979

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1 patent (USPTO):Explore Patents

Title: Hisami Tokunaga: Innovator in Oxygen Sensor Technology

Introduction

Hisami Tokunaga is a prominent inventor based in Fukuyama, Japan. She has made significant contributions to the field of sensor technology, particularly in the development of oxygen sensors. Her innovative work has led to advancements in detecting the oxygen content of molten metals, which is crucial for various industrial applications.

Latest Patents

Hisami Tokunaga holds 1 patent for her invention related to oxygen sensors. The patent discloses an improved electrical contact structure between a solid electrolyte galvanic cell and a powder reference material. This design enhances the detection of oxygen content in molten metals by embedding a portion of the solid electrolyte galvanic cell in the powder reference material. The irregular shape of this embedded portion increases the contact area and strengthens the joint between the two materials.

Career Highlights

Throughout her career, Hisami Tokunaga has worked with notable companies in the industry. She has been associated with Nippon Kokan Kabushiki Kaisha and Osaka Oxygen Industries, Ltd. These experiences have allowed her to apply her innovative ideas in practical settings, contributing to advancements in sensor technology.

Collaborations

Hisami has collaborated with several talented individuals in her field, including Takao Kawawa and Ryoichiro Imai. These collaborations have fostered a creative environment that has led to further innovations in the technology sector.

Conclusion

Hisami Tokunaga is a remarkable inventor whose work in oxygen sensor technology has made a significant impact in industrial applications. Her innovative designs and collaborations continue to inspire advancements in the field.

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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