Katsuta, Japan

Hiroyoshi Kawai

This inventor holds 1 USPTO granted patent. Top assignee: Hitachi, Ltd.. Active years: 1991.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroyoshi Kawai. Retrieved from https://idiyas.com/inventor/hiroyoshi-kawai

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 = 5.0

ph-index = 1

Forward Citations = 4(Granted Patents)


Company Filing History:


Years Active: 1991

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1 patent (USPTO):Explore Patents

Title: Hiroyoshi Kawai: Innovator in Video Tape Recorder Technology

Introduction

Hiroyoshi Kawai is a notable inventor from Katsuta, Japan, recognized for his contributions to video tape recorder technology. He has been instrumental in developing innovative solutions that enhance the functionality and performance of video recording devices.

Latest Patents

Kawai holds a patent for a rotary head cylinder designed for video tape recorders. This invention features a rotary head cylinder assembly that includes a fixed lower cylinder for guiding the travel of a magnetic tape. The upper cylinder is rotatably mounted on the lower cylinder and is equipped with multiple magnetic heads. Additionally, a circuit board is fixedly mounted on the upper cylinder, supporting amplifiers positioned close to the respective magnetic heads. The circuit board is designed with notched portions at the outer periphery, allowing direct access to screws for adjusting the height of the magnetic heads and holes for adjusting their position from above the top side of the cylinder, while minimizing interference from undesirable signals.

Career Highlights

Kawai has made significant strides in his career, particularly through his work at Hitachi, Ltd. His innovative approach and technical expertise have contributed to advancements in video technology, making him a valuable asset to the company.

Collaborations

Throughout his career, Kawai has collaborated with esteemed colleagues such as Tsutomu Masumoto and Yoshio Manabe. These partnerships have fostered a creative environment that has led to groundbreaking developments in the field.

Conclusion

Hiroyoshi Kawai's contributions to video tape recorder technology exemplify his innovative spirit and dedication to advancing the industry. His patent for the rotary head cylinder showcases his ability to solve complex engineering challenges, solidifying his legacy as a prominent inventor.

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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