Ageo, Japan

Sadao Mabuchi

This inventor holds 2 USPTO granted patents. Top assignee: Bridgestone Cycle Co., Ltd.. Active years: 1979-1989.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Sadao Mabuchi. Retrieved from https://idiyas.com/inventor/sadao-mabuchi

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

Calculating rank

% Patents Active = 100.0

Average Co-Inventor Count = 3.4

ph-index = 2

Forward Citations = 181(Granted Patents)


Company Filing History:


Years Active: 1979-1989

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2 patents (USPTO):Explore Patents

Title: Sadao Mabuchi: Innovator in Bicycle Technology

Introduction

Sadao Mabuchi is a notable inventor based in Ageo, Japan, recognized for his contributions to bicycle technology. With a total of two patents to his name, Mabuchi has made significant advancements in the design and functionality of bicycle components.

Latest Patents

Mabuchi's latest patents include a speed change device for bicycles and a method of manufacturing bicycle frames by die casting. The speed change device features a carrier jointed to a crank arm, along with multiple planet gears that enhance the bicycle's gear shifting capabilities. This innovative design incorporates one-way clutches and sun gears, allowing for efficient power transfer and improved performance. His second patent focuses on a bicycle frame that utilizes die casting to create lugs that connect tubes, resulting in a lightweight structure that minimizes stress concentrations and reduces manufacturing costs.

Career Highlights

Mabuchi is currently employed at Bridgestone Cycle Co., Ltd., a company renowned for its commitment to quality and innovation in the cycling industry. His work has contributed to the development of advanced bicycle technologies that enhance user experience and performance.

Collaborations

Mabuchi has collaborated with notable coworkers, including Kikuzo Takamiya and Kazuhiro Inoue, who share his passion for innovation in bicycle design.

Conclusion

Sadao Mabuchi's contributions to bicycle technology through his patents and work at Bridgestone Cycle Co., Ltd. highlight his role as a key innovator in the field. His inventions continue to influence the cycling industry, promoting advancements that benefit cyclists worldwide.

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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