logo

For the Inventor, By the Inventor

Tsukuba, Japan

Hiromu Hirai

This inventor holds 18 USPTO granted patents. Top assignees: Hitachi, Ltd., Hitachi Koki Co., Ltd.. Active years: 1981-2001.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiromu Hirai. Retrieved from https://idiyas.com/inventor/hiromu-hirai

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

USPTO Granted Patents = 18

% Patents Active = 100.0

Average Co-Inventor Count = 3.4

ph-index = 10

Forward Citations = 341(Granted Patents)


Location History:

  • Yatabemachi, JP (1981 - 1983)
  • Ibaraki, JP (1984 - 1986)
  • Yatabe, JP (1987)
  • Tsukuba, JP (1990 - 2001)

Company Filing History:

goldMedal18 out of 42,731 
 
Hitachi, Ltd.
 patents
silverMedal1 out of 1,267 
 
Hitachi Koki Co., Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1981-2001

Loading Chart...
18 patents (USPTO):Explore Patents
1. 6181524 - Magnetic disk apparatus with slider and slider supporting mechanism including flexible section integrally formed from same material (2001-01-30),
2. 5666334 - Storage device capable of using both optical and magnetic disk units for (1997-09-09),
3. 5486965 - Rotary information recording/reproducing apparatus carriage actuator (1996-01-23),
4. 5404255 - Disk apparatus and its control method (1995-04-04),
5. 5301078 - Magnetic disk unit and manufacturing method of carriage structure thereof (1994-04-05),
6. 5229896 - Disk drive and method of controlling the same (1993-07-20),
7. 5189578 - Disk system with sub-actuators for fine head displacement (1993-02-23),
8. 5164931 - Method and apparatus for control of positioning (1992-11-17),
9. 5073912 - Sample moving apparatus, sample moving system and semiconductor (1991-12-17),
10. 4997177 - Method of and apparatus for conveying object by utilizing vibration (1991-03-05),
11. 4956789 - Method and apparatus for driving a servo system while suppressing (1990-09-11),
12. 4667139 - Table device (1987-05-19),
13. 4587469 - Electric servo system (1986-05-06),
14. 4525654 - Tape transport control unit (1985-06-25),
15. 4430606 - Sheet feeding apparatus (1984-02-07),

Title: The Innovative Mind of Hiromu Hirai

Introduction

Hiromu Hirai, an inventive engineer from Tsukuba, Japan, stands out with a remarkable portfolio of 18 patents. His work has significantly contributed to advancements in magnetic disk technology, enhancing both information storage and retrieval processes.

Latest Patents

Among his most recent innovations is a patent for a magnetic disk apparatus designed for recording and reproducing information. This apparatus integrates a magnetic head-mounted slider with a flexible section that supports the slider, all crafted from the same material. The innovative design ensures improved functionality by allowing a rotary-type or linear-type positioning mechanism to accurately position the magnetic head at specific radial positions on the disk.

Another notable patent involves a storage device that can utilize both optical and magnetic disk units. This device connects to a personal computer and features a recording mode selecting mechanism. This mechanism allows users to choose from three recording modes: high reliability, large capacity, or high speed. By selecting the optimal recording method based on information characteristics, the controllability of the device and computer interface is significantly enhanced.

Career Highlights

Throughout his career, Hirai has made contributions to several renowned companies, including Hitachi, Ltd. and Hitachi Koki Co., Ltd. His expertise in magnetic disk technology has left a lasting impact on these organizations, showcasing his innovative spirit and technical abilities.

Collaborations

Hirai's collaborative efforts with his esteemed colleagues, Kenji Mori and Haruaki Otsuki, further exemplify his role in the technological advancements within the field. Working closely with talented professionals has undoubtedly enriched his creative processes and innovation outcomes.

Conclusion

Hiromu Hirai's journey as an inventor emphasizes the importance of innovation in technology. With a range of patents showcasing his ingenuity, he continues to influence the realms of magnetic storage and associated technologies. His work not only advances the industry but also inspires future generations of inventors to push the boundaries of what is possible.

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]
Loading…