Handa, Japan

Katsuhiko Ohiwa

This inventor holds 1 USPTO granted patent. Top assignees: Nippondenso Co., Ltd., Toyota Jidosha Kogyo Kabushiki Kaisha. Active years: 1981.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Katsuhiko Ohiwa. Retrieved from https://idiyas.com/inventor/katsuhiko-ohiwa

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 = 4.0

ph-index = 1

Forward Citations = 4(Granted Patents)


Company Filing History:


Years Active: 1981

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1 patent (USPTO):Explore Patents

Title: The Innovative Mind of Katsuhiko Ohiwa

Introduction

Katsuhiko Ohiwa is a notable inventor based in Handa, Japan. He has made significant contributions to the field of internal combustion engines, particularly with his innovative designs that address altitude-related performance issues. His work has garnered attention for its practical applications in automotive technology.

Latest Patents

Ohiwa holds a patent for an internal combustion engine with an altitude compensation device. This invention features a vacuum-operated ignition timing advancer and a carburetor equipped with an atmospheric pressure variation responsive valve. The device is designed to control the air bleed of the carburetor and the vacuum fed to the vacuum advancer. As altitude increases and atmospheric pressure decreases, the device adjusts the air flow into the advancer vacuum chamber to advance the ignition timing. Simultaneously, it increases the air flow into the carburetor air bleed passage to enhance the air-fuel ratio of the mixture produced by the carburetor. This innovative approach allows for improved engine performance at higher altitudes.

Career Highlights

Throughout his career, Katsuhiko Ohiwa has worked with prominent companies in the automotive industry, including Nippondenso Co., Ltd. and Toyota Motor Corporation. His experience in these organizations has allowed him to refine his skills and contribute to advancements in engine technology.

Collaborations

Ohiwa has collaborated with notable colleagues such as Kenji Yamada and Akira Takata. Their combined expertise has likely influenced the development of innovative solutions in the automotive sector.

Conclusion

Katsuhiko Ohiwa's contributions to the field of internal combustion engines demonstrate his innovative spirit and dedication to improving automotive technology. His patent for an altitude compensation device showcases his ability to address real-world challenges in engine performance.

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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