Tokorozawa, Japan

Fumihiro Nakajima

This inventor holds 2 USPTO granted patents. Top assignee: Pioneer Electronic Corporation. Active years: 1988-1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Fumihiro Nakajima. Retrieved from https://idiyas.com/inventor/fumihiro-nakajima-soxdc6o5

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 = 4.4

ph-index = 2

Forward Citations = 37(Granted Patents)


Company Filing History:


Years Active: 1988-1993

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2 patents (USPTO):Explore Patents

Title: Fumihiro Nakajima: Innovator in Output Level Control and Data Playback Technologies

Introduction

Fumihiro Nakajima is a notable inventor based in Tokorozawa, Japan. He has made significant contributions to the fields of audio technology and data playback systems. With a total of 2 patents to his name, Nakajima's work has had a considerable impact on the industry.

Latest Patents

One of Nakajima's latest patents is an output level controlling apparatus. This innovative device includes a signal attenuating device that adjusts the reproduced output level of a reading/recording signal from a record medium. It features a signal level deciding device that compares the reproduced output level to a pre-set reference signal level. The output level correcting device sends control signals to manage the attenuation of the output level, ensuring that high input levels are momentarily reduced to prevent distortion and maintain audio quality.

Another significant patent is a method and apparatus for data recording disc playback. This invention allows for the playback of a data recording disc that contains both audio and video signals. The system automatically adjusts the equalization and amplifier gain based on whether the playback is from the CD area or the video area. This ensures stable servo control during high-speed playback, enhancing the overall user experience.

Career Highlights

Fumihiro Nakajima is currently employed at Pioneer Electronic Corporation, a leading company in the electronics industry. His work at Pioneer has allowed him to develop and refine technologies that enhance audio and video playback systems.

Collaborations

Throughout his career, Nakajima has collaborated with talented individuals such as Takahumi Shiba and Masayuki Yoshida. These collaborations have contributed to the advancement of innovative technologies in the field.

Conclusion

Fumihiro Nakajima's contributions to output level control and data playback technologies demonstrate his commitment to innovation. His patents reflect a deep understanding of audio and video systems, making him a valuable figure in the electronics industry.

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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