Tetsuo Yokoyama

This inventor holds 52 USPTO granted patents, plus 2 CIPO patents and 4 EPO patents, primarily in Magnetic Resonance Imaging. Top assignees: Hitachi, Ltd., Hitachi Medical Corporation, Nippon Steel Sumitomo Metal Corporation. Active years: 1986-2019.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tetsuo Yokoyama. Retrieved from https://idiyas.com/inventor/tetsuo-yokoyama

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

USPTO Granted Patents = 52

% Patents Active = 96.2

CIPO Patents = 2

EPO Patents = 4 (Patent Applications = 1)

Average Co-Inventor Count = 3.9

ph-index = 14

Forward Citations = 643(Granted Patents)

Forward Citations (Not Self Cited) = 631(Dec 10, 2025)

Location History:

Nakano, JP (1987 - 1988)
Sanda, JP (2012)
Tokyo, JP (1986 - 2016)
Sandashi, JP (2019)

Company Filing History:

Hitachi Medical Corporation

patents

3 out of 1,102

Nippon Steel Sumitomo Metal Corporation

patents

4. 2 out of 149

Hitachi Microcomputer Engineering, Ltd.

patents

5. 1 out of 2

Hitachi, Ltd. , Hitachi Medical Corporation

patents

6. 1 out of 929

Sumitomo Metal Industries, Inc.

patents

where one patent can have more than one assignee

Years Active: 1986-2019

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Areas of Expertise:

Nuclear Magnetic Resonance

Image Reconstruction

Blood Flow Imaging

Phase Correction

Motion Correction

Image Registration

3D Voxel Extraction

Temperature Measurement

High-Strength Alloys

Welding Materials

Double-Wall Tubes

Nucleic Acid Separation

52 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 10201880 - Welding material and welding joint (2019-02-12),

2. 9238258 - Method for producing double-wall tube with braided wires at its interface (2016-01-19),

3. 9153348 - Double-walled tube with interface gap and production method therefor (2015-10-06),

4. 8246766 - High-strength Ni-based alloy tube for nuclear power use and method for manufacturing the same (2012-08-21),

5. 6326189 - Nucleic acid separating vessel, a method of manufacturing the nucleic acid separating vessel, and a method for separating the nucleic acid (2001-12-04),

6. 6162356 - Chip for use in nucleic acid separation, structural element and process (2000-12-19),

7. 6064391 - Method for displaying region extracting processing in an image (2000-05-16),

8. 5553207 - Method of and apparatus for region extraction in three-dimensional voxel (1996-09-03),

9. 5427100 - Method for determining median line (1995-06-27),

10. 5319551 - Region extracting method and three-dimensional display method (1994-06-07),

11. 5277182 - Coronory artery imaging method and apparatus (1994-01-11),

12. 5275164 - Multi-dimensional magnetic resonance imaging method and apparatus for (1994-01-04),

13. 5254948 - Method and apparatus for body motion corrective imaging (1993-10-19),

14. 5241271 - Ultra-fast imaging method and apparatus (1993-08-31),

15. 5207222 - Method and apparatus for measuring temperature of subject (1993-05-04),

Title: Tetsuo Yokoyama: A Pioneer in Nucleic Acid Separation Technologies

Introduction

Tetsuo Yokoyama is a distinguished inventor located in Tokyo, Japan. With an impressive portfolio of 48 patents, he has contributed significantly to the field of nucleic acid separation technologies. His innovative designs and methodologies have made a notable impact in biotechnology and medical diagnostics.

Latest Patents

Yokoyama's recent patents include advancements in nucleic acid separating vessels and methods of manufacturing these vessels. Additionally, he has developed a chip for use in nucleic acid separation. His work on composite particles formed from resin and silica provides a novel approach to creating structural elements, which are heat treated to ensure durability. This technology facilitates the effective separation of nucleic acids from liquid samples, achieving high recovery rates while minimizing defects, such as breakage.

Career Highlights

Throughout his career, Tetsuo Yokoyama has held positions at renowned companies, including Hitachi, Ltd. and Hitachi Medical Corporation. His contributions to research and development in these organizations have been pivotal in promoting innovative solutions in medical technology.

Collaborations

Yokoyama has collaborated with notable peers, including Koichi Sano and Hideaki Koizumi. These collaborations have fostered a creative environment that encourages the development of cutting-edge technologies in the field.

Conclusion

Tetsuo Yokoyama stands out as a key figure in the world of innovations related to nucleic acid separation. His extensive patent portfolio and collaborative efforts highlight his commitment to advancing technology in this vital area of research. As the demand for efficient and reliable nucleic acid separation methods continues to grow, Yokoyama’s contributions will undoubtedly play a significant role in shaping the future of biotechnology.

Profile summary based on public USPTO records.