Takamasa Ohtomo

This inventor holds 22 USPTO granted patents and 15 published patent applications, plus 1 CIPO patent and 10 EPO patents, primarily in Solid State Batteries. Top assignee: Toyota Jidosha Kabushiki Kaisha. Active years: 2015-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takamasa Ohtomo. Retrieved from https://idiyas.com/inventor/takamasa-ohtomo

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

USPTO Granted Patents = 22 (Patent Applications = 15)

% Patents Active = 100.0

CIPO Patents = 1

EPO Patents = 10 (Patent Applications = 13)

Average Co-Inventor Count = 3.4

ph-index = 5

Forward Citations = 93(Granted Patents)

Location History:

Toyota, JP (2019)
Susono, JP (2015 - 2020)

Company Filing History:

22 out of 38,912

Toyota Jidosha Kabushiki Kaisha

patents

Years Active: 2015-2025

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Areas of Expertise:

Solid-State Battery

Sulfide Solid Electrolyte

Lithium Battery

All-Solid-State Battery

Cathode Active Material

Lithium Solid Battery

Manufacturing Method

Active Material Powder

Battery Module

Lithium Ion Conducting Material

22 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12444769 - Solid-state battery (2025-10-14),

2. 10707518 - Method of producing a sulfide solid electrolyte material, sulfide solid electrolyte material, and lithium battery (2020-07-07),

3. 10355308 - Sulfide solid electrolyte material, battery, and producing method for sulfide solid electrolyte material (2019-07-16),

4. 10305140 - Sulfide solid electrolyte material, battery, and method for producing sulfide solid electrolyte material (2019-05-28),

5. 10270135 - All-solid-state battery (2019-04-23),

6. 10193185 - Sulfide solid electrolyte material and lithium solid state battery (2019-01-29),

7. 10141602 - Lithium solid battery, lithium solid battery module, and producing method for lithium solid battery (2018-11-27),

8. 10008735 - Method of producing a sulfide solid electrolyte material, sulfide solid electrolyte material, and lithium battery (2018-06-26),

9. 9972826 - Method for producing cathode active material for solid state battery (2018-05-15),

10. 9954248 - Solid lithium secondary battery and method of manufacturing same (2018-04-24),

11. 9929403 - Method of producing an active material powder (2018-03-27),

12. 9819207 - All solid state battery system (2017-11-14),

13. 9748603 - Sulfide solid electrolyte material, battery, and producing method for sulfide solid electrolyte material (2017-08-29),

14. 9680179 - Sulfide solid electrolyte material, cathode body and lithium solid state battery (2017-06-13),

15. 9614224 - Cathode active material for lithium battery, lithium battery, and method for producing cathode active material for lithium battery (2017-04-04),

Title: Innovations by Takamasa Ohtomo: A Leader in Battery Technology

Introduction

Takamasa Ohtomo is an esteemed inventor located in Susono, Japan, known for his significant contributions to the field of battery technology. With a remarkable portfolio of 21 patents, he is recognized for his innovative approaches to developing materials that enhance battery performance, particularly in solid-state electrolytes.

Latest Patents

Ohtomo's latest patents encompass groundbreaking methods for producing sulfide solid electrolyte materials and lithium batteries. One notable patent is a method that outlines a two-step vitrification process to create a sulfide solid electrolyte material. This process includes the formation of an intermediate that contains crosslinking sulfur while ensuring no lithium sulfide (LiS) is present. The second step involves eliminating this crosslinking sulfur through the use of a bond-cleaving compound. Together, these innovations aim to produce a sulfide solid electrolyte material characterized by favorable ion conductivity, thereby improving charge and discharge efficiency in batteries.

Career Highlights

Currently, Ohtomo works with Toyota Jidosha Kabushiki Kaisha, where he applies his expertise to advance automotive battery technology. His inventions not only contribute to the improvement of lithium batteries but also play a vital role in enhancing the overall performance and efficiency of electric vehicles.

Collaborations

Takamasa Ohtomo collaborates closely with talented coworkers, including Yuki Kato and Koji Kawamoto. Together, they form a dynamic team that drives innovation and research in the field of battery materials, contributing to technological advancements within the automotive industry.

Conclusion

Takamasa Ohtomo’s work is pivotal in shaping the future of battery technology. His innovative patents and collaborative efforts continue to push the boundaries of what is possible in energy storage solutions. With a commitment to enhancing the efficiency and performance of batteries, Ohtomo is undoubtedly a prominent figure in the world of inventions and innovations.

Profile summary based on public USPTO records.