Kenji Kitamura

This inventor holds 60 USPTO granted patents and 2 published patent applications and 7 EPO patents, primarily in Battery Technology (CPC class B64G). Top assignees: National Institute for Materials Science, Fdk Corporation, Sumitomo Osaka Cement Co., Ltd.. Active years: 1980-2025.

USPTO Granted Patents = 60 (Patent Applications = 2)

% Patents Active = 75.0

EPO Patents = 7 (Patent Applications = 6)

Average Co-Inventor Count = 3.5

ph-index = 11

Forward Citations = 410(Granted Patents)

Forward Citations (Not Self Cited) = 390(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Tsuchiura, JP (1981)
Gifu, JP (1994)
Chiba, JP (2000 - 2004)
Tsukuba, JP (1999 - 2014)
Ibaraki, JP (2002 - 2020)
Chiyoda-ku, JP (2019 - 2021)
Tokyo, JP (1980 - 2024)

Company Filing History:

17 out of 575

National Institute for Materials Science

Sumitomo Osaka Cement Co., Ltd.

patents

4. 7 out of 2,903

Seiko Instruments Inc

patents

5. 6 out of 16,571

Mitsubishi Electric Corporation

patents

6. 6 out of 73

National Institute for Research in Inorganic Materials

patents

7. 3 out of 105

Toyo Ink Mfg. Co., Ltd.

patents

8. 2 out of 95

Kayaba Kogyo Kabushiki Kaisha

patents

9. 2 out of 223

Toyo Ink Manufacturing Company

patents

10. 2 out of 15,988

University of California

patents

11. 1 out of 1,328

Japan Science and Technology Agency

patents

12. 1 out of 308

Kayaba Industry Company, Ltd.

patents

13. 1 out of 471

National Institute of Information and Communications Technology, Incorporated

Sakai Chemical Industry Co., Ltd.

patents

16. 1 out of 2,166

University of Washington

patents

17. 4 out of 834,411

Other

patents

where one patent can have more than one assignee

Years Active: 1980-2025

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Areas of Expertise:

Battery Charger

Charge Calculation

Backup Power Supply

Battery Polarity

Orbital Attitude Control

Artificial Satellite

Optical Device

Photorefractive Material

Fuel Cell

Wavelength Conversion

Substrate

Optically Functional Device

60 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12506187 - Battery bank unit, remaining charge time calculation method, and non transitory recording medium storing computer readable program storing therein for calculating remaining charge time of battery bank unit (2025-12-23),

2. 12374884 - Backup power supply device (2025-07-29),

3. 12240631 - Orbital attitude control device, satellite, orbital attitude control method, and recording medium (2025-03-04),

4. 11936223 - Battery polarity determination circuit, charger, and electronic device (2024-03-19),

5. D1012017 - Battery charger (2024-01-23),

6. 11742685 - Charger and charging method (2023-08-29),

7. 11655056 - Orientation control device, satellite, orientation control method, and program (2023-05-23),

8. 11387660 - Automatic charger (2022-07-12),

9. 11228186 - Charger having failure detection function and failure detection method (2022-01-18),

10. 11167867 - Artificial satellite, attitude control system, and attitude control method (2021-11-09),

11. 10951048 - Charging circuit (2021-03-16),

12. 10906672 - Autonomous operation planning system for artificial satellite and operation planning apparatus therefor (2021-02-02),

13. 10756372 - Proton conductor and fuel cell (2020-08-25),

14. 10752384 - Orbit control device and satellite (2020-08-25),

15. 10407187 - Device for controlling attitude of spacecraft and method for calculating CMG gimbal angle (2019-09-10),

Title: Kenji Kitamura: Innovator in Battery Technologies

Introduction

Kenji Kitamura is a distinguished inventor based in Ibaraki, Japan. He has made significant contributions to the field of battery technology, holding an impressive portfolio of 56 patents. His work is celebrated for advancing the efficiency and reliability of electronic devices.

Latest Patents

Among his latest innovations are the battery polarity determination circuit and a battery charger. The battery polarity determination circuit is designed to ensure accurate identification of battery polarity. It includes key components such as a control device, a connection switching circuit, and a diode, all working together to determine the polarity based on the voltage at the read-in point, maintaining safe operational standards. This innovation plays a critical role in enhancing the performance and safety of battery-operated devices.

Career Highlights

Kenji's career is marked by his tenure at notable institutions, including the National Institute for Materials Science and Sumitomo Osaka Cement Co., Ltd. His experiences at these organizations have equipped him with invaluable knowledge and skills that he has applied in developing groundbreaking technologies.

Collaborations

Throughout his career, Kenji Kitamura has collaborated with esteemed colleagues such as Shunji Takekawa and Yasunori Furukawa. These partnerships have fostered an environment of innovation, allowing for the sharing of ideas and the enhancement of research efforts in battery technology.

Conclusion

Kenji Kitamura's contributions to battery technology are invaluable, evidenced by his extensive patent record and collaborative efforts in the field. His innovations not only provide advancements in electronic devices but also pave the way for future developments in energy storage solutions. As he continues to innovate, the impact of his work will likely resonate across various sectors reliant on battery technologies.