Masakazu Fujishima

This inventor holds 5 USPTO granted patents. Top assignees: Nippon Gakki Seizo Kabushiki Kaisha, Yamaha Corporation. Active years: 1980-2006.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masakazu Fujishima. Retrieved from https://idiyas.com/inventor/masakazu-fujishima

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

USPTO Granted Patents = 5

% Patents Active = 80.0

Average Co-Inventor Count = 1.2

ph-index = 4

Forward Citations = 92(Granted Patents)

Company Filing History:

3 out of 841

Nippon Gakki Seizo Kabushiki Kaisha

Years Active: 1980-2006

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5 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 7141733 - Karaoke apparatus, content reproducing apparatus, method of managing music piece data for a karaoke apparatus, and method of managing content data for content reproducing apparatus (2006-11-28),

2. 4835758 - Dropout detection device for an optical type disc playback device (1989-05-30),

3. 4789976 - Temperature compensation circuit for a delay circuit utilized in an FM (1988-12-06),

4. 4435618 - Adjacent station interference rejecting circuit (1984-03-06),

5. 4232394 - Station-signal frequency indication system for radio receiver (1980-11-04),

Title: Masakazu Fujishima: Innovator in Karaoke and Optical Disc Technology

Introduction

Masakazu Fujishima is a notable inventor based in Hamamatsu, Japan. He has made significant contributions to the fields of karaoke technology and optical disc playback devices. With a total of 5 patents to his name, Fujishima's innovations have had a lasting impact on the entertainment industry.

Latest Patents

Fujishima's latest patents include a karaoke apparatus and a content reproducing apparatus. He developed a method for managing music piece data for karaoke systems, which allows for the storage of managed music pieces on a hard disk. This innovation eliminates the need for physical media like CD-ROMs for each managed music piece. Additionally, he created a dropout detection device for optical disc playback devices. This device simplifies the detection of dropouts in reproduced signals, enhancing the reliability of playback systems.

Career Highlights

Throughout his career, Fujishima has worked with prominent companies such as Nippon Gakki Seizo Kabushiki Kaisha and Yamaha Corporation. His work at these organizations has allowed him to develop and refine his inventions, contributing to advancements in music technology.

Collaborations

Fujishima has collaborated with talented individuals in the industry, including Minoru Ogita and Shingo Kamiya. These partnerships have fostered innovation and creativity in his projects.

Conclusion

Masakazu Fujishima's contributions to karaoke and optical disc technology demonstrate his innovative spirit and dedication to enhancing user experiences. His patents continue to influence the industry, showcasing the importance of creativity in technology.

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]