Nagoya, Japan

Hirokazu Yamada

This inventor holds 22 USPTO granted patents and 3 EPO patents, primarily in Gas Sensors. Top assignees: Denso Corporation, Nippondenso Co., Ltd.. Active years: 1998-2021.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hirokazu Yamada. Retrieved from https://idiyas.com/inventor/hirokazu-yamada-ya61w1pi

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

Calculating rank

% Patents Active = 90.9


Average Co-Inventor Count = 2.4

ph-index = 6

Forward Citations = 105(Granted Patents)


Location History:

  • Aichi-ken, JP (2002)
  • Nagoya, JP (1998 - 2017)
  • Kariya, JP (1998 - 2021)

Company Filing History:


Years Active: 1998-2021

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Areas of Expertise:
Gas Sensor
Oxygen Sensor
Air-Fuel Ratio Sensor
Manufacturing Method
Compact Structure
Ceramic Heater
Flange Portion
Electric Connector
Pre-Stressed Terminal
Protective Cover
Improved Structure
Oxygen Concentration Sensor
22 patents (USPTO):Explore Patents

Title: Innovations of Hirokazu Yamada: A Leader in Gas Sensor Technology

Introduction: Hirokazu Yamada, based in Nagoya, Japan, is an accomplished inventor with a remarkable portfolio of 22 patents. His innovative contributions to the field of gas sensors have significantly advanced the technology used for detecting various gases. Yamada's work reflects a deep understanding of engineering principles and practical applications, making him a notable figure in the industry.

Latest Patents: Among his latest patents, Yamada has developed a gas sensor with a unique structure that ensures the stability of installation for a protective cover. This gas sensor features a sensor body secured to a sensor-mounting member using an attachment screw. The innovative design allows for smooth rotational movement of the attachment screw while maintaining the integrity of the sensor body and its protective features. Furthermore, his gas sensor includes a sophisticated design with an inner cover and an outer cover, where the flange portions are precisely positioned to enhance the sensor's overall functionality and reliability.

Career Highlights: Hirokazu Yamada has made significant strides in his career, particularly through his work at Denso Corporation and Nippondenso Co., Ltd. His dedication to innovation in gas sensor technology has set new benchmarks in the industry, showcasing his commitment to excellence in research and development.

Collaborations: Throughout his career, Yamada has collaborated with other prominent engineers and inventors, including Takashi Kojima and Isao Watanabe. These collaborations have allowed him to enhance his technological advancements and achieve even greater levels of innovation in his projects.

Conclusion: Hirokazu Yamada has established himself as a leading inventor in the field of gas sensor technology. With 22 patents to his name, his innovative designs demonstrate a significant contribution to the industry. Yamada's work continues to inspire future innovations, ensuring a brighter and more advanced future in gas detection technologies.

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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