Yoshiaki Sakai

This inventor holds 29 USPTO granted patents, primarily in Magnetic Data Storage. Top assignees: Teac Corporation, Mitsubishi Electric Corporation. Active years: 1978-2000.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshiaki Sakai. Retrieved from https://idiyas.com/inventor/yoshiaki-sakai

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

USPTO Granted Patents = 29

% Patents Active = 100.0

Average Co-Inventor Count = 2.8

ph-index = 8

Forward Citations = 226(Granted Patents)

Location History:

Musashino, JA (1978)
Tokyo, JP (1986)
Musashino, JP (1979 - 1995)
Higashikurume, JP (1986 - 1996)
Hgashikurume, JP (2000)

Company Filing History:

Mitsubishi Electric Corporation

patents

where one patent can have more than one assignee

Years Active: 1978-2000

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Areas of Expertise:

Magnetic Head

Disk Drive

Data Transfer

Magnetic Disk

Spindle Motor

Power Consumption

Data Storage

Eject Mechanism

Vibration Control

Tape Cartridge

Clamping Apparatus

Cosine Equalizer

29 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6097576 - Magnetic head (2000-08-01),

2. 5583711 - Greater capacity writing method for a belt-driven tape cartridge or the (1996-12-10),

3. 5442608 - Disk apparatus having a power consumption reducing mechanism (1995-08-15),

4. D357467 - Disk unit (1995-04-18),

5. D357005 - Disk unit (1995-04-04),

6. 5357384 - Rotating disk data storage apparatus capable of preventing head travel (1994-10-18),

7. 5309628 - Assembling position adjusting mechanism of a spindle motor for a (1994-05-10),

8. D345553 - Disc drive (1994-03-29),

9. 5299074 - System for positioning a head in a transverse reference position on a (1994-03-29),

10. 5291356 - Disk storage device having eject member (1994-03-01),

11. D344270 - Disc drive (1994-02-15),

12. D343389 - Disk drive (1994-01-18),

13. D342726 - Disc drive (1993-12-28),

14. 5155638 - Compatible data storage apparatus for use with disk assemblies of two or (1992-10-13),

15. 5043833 - Magnetic head assembly (1991-08-27),

Title: Innovations of Yoshiaki Sakai: A Pioneer in Magnetic and Tape Technologies

Introduction

Yoshiaki Sakai, located in Higashikurume, Japan, is a distinguished inventor with an impressive portfolio of 29 patents. His innovative contributions primarily focus on advancements in magnetic heads and tape technologies. Sakai's work exemplifies the intersection of engineering and creativity in the tech industry, driving progress and efficiency.

Latest Patents

Among his latest inventions, Sakai developed a miniaturized magnetic head designed to reduce the running torque of disk driving motors while maintaining effective head-touch and penetration margins. This magnetic head incorporates a slider that glides over a flexible magnetic disk, featuring an integrally formed head core for recording and reproducing information. Critical to its design is a groove, measuring less than 0.4 mm in width, facilitating improved performance as it extends tangentially across the slider's surface.

Another notable patent is his method for writing greater capacity on belt-driven tape cartridges. In this innovation, he outlines a technique for managing tape tension effectively as it moves from one reel to another. By predividing forward and reverse tracks into groups and strategically positioning the writing start points, Sakai's method allows for increased storage capacity compared to conventional approaches.

Career Highlights

Sakai has an extensive career with significant contributions to prominent companies in the industry, including Teac Corporation and Mitsubishi Electric Corporation. His work in these organizations has been instrumental in developing cutting-edge technology in magnetic and tape devices.

Collaborations

Throughout his career, Sakai has collaborated with esteemed professionals such as Hiroshi Tsuyuguchi and Shinichi Aikawa. Their joint efforts have fostered innovation and enhanced the technological landscape in their fields.

Conclusion

Yoshiaki Sakai's ingenuity and dedication to enhancing magnetic and tape technologies through his numerous patents underscore his status as a leading inventor in Japan. His contributions continue to influence the industry, paving the way for future innovations that improve efficiency and performance in data storage technologies.

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]