Hatsukaichi, Japan

Masaru Shiraishi

This inventor holds 9 USPTO granted patents and 1 EPO patent. Top assignee: Mazda Motor Corporation. Active years: 1991-2011.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masaru Shiraishi. Retrieved from https://idiyas.com/inventor/masaru-shiraishi

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

Calculating rank

% Patents Active = 88.9


Average Co-Inventor Count = 3.1

ph-index = 7

Forward Citations = 126(Granted Patents)


Location History:

  • Hatsukaichi, JP (1993 - 1994)
  • Hiroshima, JP (1991 - 2011)

Company Filing History:


Years Active: 1991-2011

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9 patents (USPTO):Explore Patents

Title: **Masaru Shiraishi: Innovator in Automotive Transmission**

Introduction

Masaru Shiraishi, an accomplished inventor based in Hatsukaichi, Japan, has made significant contributions to automotive engineering. With a total of nine patents to his name, Shiraishi has continually pushed the boundaries of innovation within the industry.

Latest Patents

Among his latest patents, Shiraishi's work on a sophisticated transmission system stands out. This invention is designed to minimize the number of speed-change driven gears on a first countershaft. This innovative approach not only maximizes layout space within an engine compartment but also reduces the driving torque applied to a second countershaft, facilitating the downsizing of the transmission. Additionally, his patent includes a unique configuration where the first countershaft is positioned above an input shaft, featuring a first-speed driven gear and a second-speed driven gear.

Shiraishi has also developed a patent for a transfer case intended for four-wheel drive vehicles. This transfer case includes a front wheel drive axle assembly with a first wheel drive axle shaft and a second wheel drive axle assembly. Notably, both helical ring gears are integrated as a single unit and bolted to a differential housing, enhancing performance and efficiency.

Career Highlights

Masaru Shiraishi is currently employed at Mazda Motor Corporation, where he has been pivotal in advancing the company’s automotive technology. His work has helped position Mazda as a leader in innovative vehicle designs and functionalities.

Collaborations

Throughout his career, Shiraishi has collaborated with talented colleagues such as Wataru Kuwahara and Hideshi Hiruta. Together, they have shared insights and expertise, further enhancing the innovations developed within Mazda.

Conclusion

In conclusion, Masaru Shiraishi exemplifies the spirit of innovation in the automotive industry. With his numerous patents and contributions, he continues to influence vehicle design and engineering, marking him as a notable inventor in modern automotive history. His work not only reflects creativity but also underscores the importance of collaboration in advancing technology.

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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