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For the Inventor, By the Inventor

Ibaraki, Japan

Toshihiko Shimizu

This inventor holds 69 USPTO granted patents and 1 published patent application, primarily in Magnetic Disk Technology (CPC class G11B). Top assignees: Hitachi, Ltd., Hitachi Global Storage Technologies Japan, Ltd., Hitachi Global Storage Technologies Netherlands B.v.. Active years: 1988-2021.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Toshihiko Shimizu. Retrieved from https://idiyas.com/inventor/toshihiko-shimizu

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

USPTO Granted Patents = 69 

% Patents Active = 68.1

Average Co-Inventor Count = 4.0

ph-index = 15

Forward Citations = 843(Granted Patents)

Forward Citations (Not Self Cited) = 833(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Setagaya, JP (1989)
  • Hachioji, JP (1990 - 1992)
  • Kawagoe, JP (1993 - 1994)
  • Ibaraki-ken, JP (1997 - 2006)
  • Yasato, JP (2002 - 2009)
  • Tokorozawa, JP (2004 - 2012)
  • Ibaraki, JP (2000 - 2014)
  • Tokyo, JP (1988 - 2021)

Company Filing History:

goldMedal27 out of 42,731 
 
Hitachi, Ltd.
 patents
silverMedal9 out of 227 
 
Hitachi Global Storage Technologies Japan, Ltd.
 patents
bronzeMedal8 out of 2,636 
 
Hitachi Global Storage Technologies Netherlands B.v.
 patents
4. 6 out of 2,861 
 
Pioneer Electronic Corporation
 patents
5. 6 out of 3,781 
 
Renesas Technology Corp.
 patents
6. 3 out of 2,874 
 
Hitachi-High-Technologies Corporation
 patents
7. 2 out of 987 
 
Hgst Netherlands, B.v.
 patents
8. 2 out of 900 
 
Hitachi Medical Corporation
 patents
9. 2 out of 7,654 
 
Renesas Electronics Corporation
 patents
10. 1 out of 17 
 
Hitachi Communication Systems, Inc.
 patents
11. 1 out of 3 
 
Hitachi Communications Systems, Inc.
 patents
12. 1 out of 2,333 
 
Hitachi Metals, Ltd.
 patents
13. 1 out of 152 
 
Hoya Lens Thailand Ltd.
 patents
14. 1 out of 16,602 
 
Mitsubishi Electric Corporation
 patents
15. 1 out of 834,513 
Other
 patents
where one patent can have more than one assignee

Years Active: 1988-2021

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Areas of Expertise:
Magnetic Disk Device
Semiconductor Device
High Frequency Amplifier
Magnetic Head
Carriage Arm Assembly
Vibration Suppression
Charged Particle Beam
Flow Rate Control
Magnetic Recording System
Polarizing Lens
RF Power Amplifier
Drive Mechanism
69 patents (USPTO):Explore Patents
1. 11016449 - Duplexing process control device (2021-05-25),
2. 10747025 - Polarizing lens, eyewear, and method for manufacturing polarizing lens (2020-08-18),
3. 10591018 - Vibration-suppressing mechanism to be attached to charged particle beam device, and charged particle beam device (2020-03-17),
4. 10153128 - Charged particle beam apparatus and sample elevating apparatus (2018-12-11),
5. 10018277 - Flow rate control valve and mass flow controller using the same (2018-07-10),
6. 9734983 - Charged particle radiation apparatus (2017-08-15),
7. 8699166 - Magnetic head drive device with micro-actuators of end arms rotating in a direction opposite micro-actuators of intermediate arms (2014-04-15),
8. 8537500 - Magnetic disk device (2013-09-17),
9. 8339204 - Semiconductor device (2012-12-25),
10. 8094412 - Magnetic disk device and head stack assembly (2012-01-10),
11. 8064171 - Magnetic disk drive and voice coil motor (2011-11-22),
12. 7952434 - Semiconductor device (2011-05-31),
13. 7756494 - RF power amplifier (2010-07-13),
14. 7652850 - Rotating disk type storage unit with reduced vibration (2010-01-26),
15. 7576944 - Shielding function for magnetic head in magnetic disk device (2009-08-18),

Title: **Toshihiko Shimizu: A Leading Innovator in Technology**

Introduction

Toshihiko Shimizu is an accomplished inventor based in Ibaraki, Japan, with a remarkable portfolio of 69 patents. His innovative contributions span various fields of technology, showcasing his expertise and creativity as an inventor.

Latest Patents

Among his latest innovations, Shimizu developed a Duplexing Process Control Device, which enhances the efficiency of control systems. This device leverages a control data memory system to transmit essential control data from the primary controller to a standby system, thereby improving processing performance.

Additionally, he created a novel Polarizing Lens, which includes a polarizing polyvinyl alcohol film strategically arranged between two base materials. This lens features a hydrophobic region that enhances the lens’s functionality by providing higher hydrophobicity around the edge surface, a significant advancement in eyewear technology.

Career Highlights

Shimizu has made significant contributions while working for leading companies in the tech industry, including Hitachi, Ltd. and Hitachi Global Storage Technologies Japan, Ltd. His experience has enriched his understanding of complex engineering challenges and innovation.

Collaborations

Throughout his career, Shimizu has worked alongside talented professionals, including Hiromitsu Masuda and Mikio Tokuyama. These collaborations have fostered an environment of creativity and innovation that has led to numerous technological advancements.

Conclusion

Toshihiko Shimizu's work stands as a testament to the impact of innovation in technology. His extensive patent portfolio reflects his dedication to enhancing product functionality and improving user experience. With continued efforts, he remains a pivotal figure in the field of invention, contributing valuable solutions to modern technological challenges.

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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