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For the Inventor, By the Inventor

Kanagawa, Japan

Motoyasu Yumita

This inventor holds 4 USPTO granted patents. Top assignee: Sony Corporation. Active years: 1998-2009.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Motoyasu Yumita. Retrieved from https://idiyas.com/inventor/motoyasu-yumita

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

Calculating rank
USPTO Granted Patents = 4

% Patents Active = 50.0

Average Co-Inventor Count = 1.4

ph-index = 2

Forward Citations = 10(Granted Patents)


Company Filing History:

goldMedal4 out of 58,150 
 
Sony Corporation
 patents

Years Active: 1998-2009

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4 patents (USPTO):Explore Patents
1. 7586816 - Playback apparatus and layer jump method (2009-09-08),
2. 6716508 - Optical recording medium (2004-04-06),
3. 6487144 - DISK RECORDING MEDIUM INCLUDING DATA PRE-FORMATTED-DATA-RECORDED HEADER HAVING FIRST AND SECOND IDENTICAL ADDRESS NUMBERS RADIALLY DISPLACED FROM EACH OTHER ON OPPOSITE SIDES OF GROOVE OR LAND TRACK CENTER LINE, AND DISK DRIVE UNIT FOR USE WITH THE RECORDING MEDIUM (2002-11-26),
4. 5822281 - Disk apparatus and disk access method employing counterelectromotive (1998-10-13),

Title: Motoyasu Yumita: Innovator in Optical Recording Technology

Introduction

Motoyasu Yumita is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of optical recording technology, holding a total of 4 patents. His work has been instrumental in advancing the capabilities of playback apparatuses and optical recording mediums.

Latest Patents

Yumita's latest patents include a playback apparatus and a layer jump method. The playback apparatus is designed to play back a recording medium with multiple recording layers. It features an optical head that uses laser light to read information from these layers. The apparatus includes various components such as an actuator for holding the objective lens, focus servo means, layer movement driving means, and tracking servo means. These elements work together to ensure precise playback and enhance the user experience.

Another notable patent is related to an optical recording medium that records data on both lands and grooves. This innovative format divides the recording area into multiple zones, ensuring that headers are arranged in a way that minimizes noise in the tracking error signal. This design enhances the stability of landing when traversing zone boundaries, making it a significant advancement in optical recording technology.

Career Highlights

Motoyasu Yumita is currently employed at Sony Corporation, where he continues to develop cutting-edge technologies in the field of optical recording. His work has not only contributed to the company's success but has also influenced the industry as a whole.

Collaborations

Yumita has collaborated with notable colleagues such as Masayoshi Nagata and Junichi Horigome. These partnerships have fostered innovation and have led to the development of advanced technologies in optical recording.

Conclusion

Motoyasu Yumita is a key figure in the realm of optical recording technology, with a proven track record of innovation and collaboration. His contributions have significantly impacted the industry, and his patents continue to pave the way for future advancements.

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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