Toyokawa, Japan

Sadao Yamaoka

This inventor holds 1 USPTO granted patent. Top assignee: Minolta Camera Kabushiki Kaisha. Active years: 1978.

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

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 = 2.0

ph-index = 1

Forward Citations = 23(Granted Patents)


Company Filing History:


Years Active: 1978

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1 patent (USPTO):Explore Patents

Title: The Innovations of Sadao Yamaoka

Introduction

Sadao Yamaoka is a notable inventor based in Toyokawa, Japan. He has made significant contributions to the field of electrophotographic technology. His work primarily focuses on improving the efficiency and reliability of copying machines.

Latest Patents

Yamaoka holds a patent for a jam detecting device in electrophotographic copying machines. This innovative device is designed to detect copy paper jamming. It features a first circuit that identifies the presence of copy paper ready to be fed into various processing stations. Additionally, a second circuit detects the same copy paper at the discharge position. A timer circuit measures the time interval between these detections. If the interval exceeds a predetermined time, the device produces a signal indicating a paper jam.

Career Highlights

Sadao Yamaoka has dedicated his career to advancing technology in the copying machine industry. He works for Minolta Camera Kabushiki Kaisha, a company known for its innovative imaging products. His contributions have helped enhance the functionality and user experience of copying machines.

Collaborations

Yamaoka has collaborated with fellow inventor Kenichi Arai. Together, they have worked on various projects aimed at improving copying technology.

Conclusion

Sadao Yamaoka's innovative work in the field of electrophotographic copying machines has led to significant advancements in technology. His patent for a jam detecting device exemplifies his commitment to enhancing machine efficiency. His contributions continue to impact the industry positively.

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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