Location History:
- OTH OF Susono, JA (1977)
- Susono, JA (1976 - 1978)
- Susono, JP (1979)
- Mishimashi, JP (1982)
- Shizuoka, JP (1984)
- Toyota, JP (1984)
- Mishima, JP (1979 - 2003)
- Okazaki, JP (2014)
Company Filing History:
19 out of 36,713 
19 out of 1,838 
3 out of 5,207 
Years Active: 1976-2025
Title: Hiroshi Kawaguchi: Innovator in Automotive Steel and Steering Technology
Introduction: Hiroshi Kawaguchi, an accomplished inventor based in Mishima, Japan, has made remarkable contributions to the field of automotive engineering. With 36 patents to his name, Kawaguchi's work primarily addresses the enhancement of materials and mechanisms that are crucial for automobile performance and safety.
Latest Patents: Among his latest innovations, Kawaguchi holds a patent for a specialized steel designed for structural components of automobiles. This steel exhibits excellent formability, fatigue endurance post-quenching, low-temperature toughness, resistance to hydrogen embrittlement, and corrosion fatigue endurance. The production method involves heating a steel slab between 1160°C to 1320°C, followed by hot-finish-rolling at a final delivery temperature of 750°C to 980°C. After this, the steel is coiled at a temperature range of 560°C to 740°C after a slow cooling period of two seconds or more. The resulting hot-rolled steel strip possesses a specific ferrite grain diameter and volume fraction tailored to enhance mechanical properties. Another significant patent is for a steering apparatus for automobiles, which features a non-mechanical connection between the steering operating means and the steering mechanism. This innovation incorporates a pair of steering motors strategically positioned within the mechanism, alongside a control unit that effectively distributes the necessary steering force based on the deviation between the operator and actual steering positions.
Career Highlights: Kawaguchi's career has been prominently associated with Toyota Motor Corporation, where he has contributed significantly to automotive innovation and development. His work has not only enhanced the performance of vehicles produced by the company but also set new standards within the industry.
Collaborations: Throughout his career, Hiroshi Kawaguchi has worked alongside notable colleagues such as Shuho Nishina and Akio Okada. Their collaborative efforts have played a crucial role in the success of projects and the generation of innovative solutions in the automotive sector.
Conclusion: Hiroshi Kawaguchi stands out as a leading figure in automotive innovation, particularly in the development of advanced materials and steering systems. His extensive patent portfolio and collaborations highlight his dedication to enhancing automobile safety and performance, marking him as a pivotal inventor in the automotive industry.