Toshihiko Soyama

This inventor holds 12 USPTO granted patents and 6 published patent applications, plus 2 CIPO patents and 9 EPO patents. Top assignees: Hokuetsu Corporation, Hokuetsu Kishu Paper Co., Ltd., Hokuetsu Paper Mills, Ltd.. Active years: 2005-2025.

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

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

USPTO Granted Patents = 12 (Patent Applications = 6)

% Patents Active = 83.3

CIPO Patents = 2

EPO Patents = 9 (Patent Applications = 11)

Average Co-Inventor Count = 3.0

ph-index = 4

Forward Citations = 94(Granted Patents)

Location History:

Nagaoka, JP (2005 - 2019)
Niigata, JP (2016 - 2024)

Company Filing History:

Hokuetsu Kishu Paper Co., Ltd.

patents

4 out of 10

Hokuetsu Paper Mills, Ltd.

patents

4. 2 out of 1,356

The University of Tokyo

patents

5. 1 out of 24

Nikki-Universal Co., Ltd.

patents

where one patent can have more than one assignee

Years Active: 2005-2025

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12 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12428544 - Electromagnetic wave shield sheet manufacturing method and electromagnetic wave shield sheet (2025-09-30),

2. 12410058 - Method for manufacturing carbon nanotube aqueous dispersion (2025-09-09),

3. 11969695 - Porous body and process for manufacturing same (2024-04-30),

4. 10443167 - Method for producing a wet-laid nonwoven fabric (2019-10-15),

5. 9889411 - Nonwoven fabric for semipermeable membrane support (2018-02-13),

6. 9656196 - Filter material for air filter, method for manufacturing same, and air filter provided with same (2017-05-23),

7. 9328211 - Porous cellulose body and method for producing same (2016-05-03),

8. 8951324 - Air filter medium (2015-02-10),

9. 8662316 - Filter medium for liquid filtration and process for producing the same (2014-03-04),

10. 7547339 - Filter material take-up product for air filter (2009-06-16),

11. 7520912 - Air purifying filter media and process for producing the same (2009-04-21),

12. 6939386 - Filter medium for air filter and method for its production (2005-09-06),

Title: Innovations of Toshihiko Soyama

Introduction

Toshihiko Soyama is a notable inventor based in Nagaoka, Japan. He has made significant contributions to the field of electromagnetic wave shielding technology. With a total of 12 patents to his name, Soyama's work focuses on enhancing the effectiveness and cost-efficiency of electromagnetic wave shielding materials.

Latest Patents

Soyama's latest patents include a method for manufacturing an electromagnetic wave shield sheet and a method for producing a carbon nanotube aqueous dispersion. The electromagnetic wave shield sheet manufacturing method allows for the production of a shielding sheet that possesses high shielding properties against electromagnetic waves while being cost-effective. This method involves preparing a dispersion containing carbon nanotubes, an inorganic pigment, sodium carboxymethyl cellulose, and water, followed by drying the dispersion. The ratio of the mass of the inorganic pigment to the mass of the carbon nanotubes is maintained between 1/4 and 1. The second patent focuses on creating a carbon nanotube aqueous dispersion with satisfactory dispersibility, utilizing a mixture of carbon nanotubes, carboxymethyl cellulose, and water, and employing an aqueous counter collision method for dispersion.

Career Highlights

Soyama has worked with prominent companies such as Hokuetsu Kishu Paper Co., Ltd. and Hokuetsu Paper Mills, Ltd. His experience in these organizations has contributed to his expertise in the field of materials science and engineering.

Collaborations

Some of his notable coworkers include Junji Nemoto and Masashi Sato. Their collaboration has likely fostered innovative ideas and advancements in their respective projects.

Conclusion

Toshihiko Soyama's contributions to the field of electromagnetic wave shielding technology are significant and impactful. His innovative patents and collaborations highlight his dedication to advancing materials science.

Profile summary based on public USPTO records.