Tochigi, Japan

Masaharu Shirasawa

This inventor holds 4 USPTO granted patents. Top assignees: Kabushiki Kaisha Universal, Universal Co., Ltd.. Active years: 1989-1994.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masaharu Shirasawa. Retrieved from https://idiyas.com/inventor/masaharu-shirasawa

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 = 1.1

ph-index = 3

Forward Citations = 99(Granted Patents)


Company Filing History:


Years Active: 1989-1994

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4 patents (USPTO):Explore Patents

Title: The Ingenious Mind of Masaharu Shirasawa

Introduction

Masaharu Shirasawa, an inventive mind hailing from Tochigi, Japan, has made significant contributions to the field of coin-operated machines. With a remarkable portfolio of 4 patents, Shirasawa has carved a niche for himself through his innovative solutions aimed at enhancing gaming experiences.

Latest Patents

Shirasawa's latest inventions include a Coin Supply Device for Coin-Operated Gaming Machines and a Coin Lifting Device. The Coin Supply Device revolutionizes the way coins are handled within machines by employing a conveyor belt along with a separating roller that effectively manages overlapping coins. This mechanism allows the lowermost coin to be seamlessly fed into a pay-out hopper after detecting it with a coin sensor.

His second patent, the Coin Lifting Device, features a rotating disk that propels coins towards a rotating body equipped with a spiral groove. This innovative design ensures coins are maintained in a horizontal posture and discharged efficiently through an upper discharge port, aided by a rubber-surfaced roller that enhances the insertion of coins into the spirals.

Career Highlights

Masaharu Shirasawa has collaborated with notable companies in the industry, including Kabushiki Kaisha Universal and Universal Co., Ltd. His expertise and ingenuity have played a pivotal role in developing user-friendly and effective solutions for coin management in gaming.

Collaborations

During his career, Shirasawa has had the opportunity to work alongside Tsuyoshi Ito, a fellow innovator. Their collaborative efforts have fostered advancements in the coin-operated machine sector, pushing the boundaries of technology in fun and engaging ways.

Conclusion

Masaharu Shirasawa's innovative spirit and practical inventions have significantly impacted the gaming industry. His contributions continue to be a testament to how inventive minds can transform experiences and create new opportunities.

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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