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Primearth Ev Energy Co., Ltd.

USPTO Granted Patents = 43

EPO Patents = 8

Trademarks = 3

Forward Citations = 91

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107 inventors (with patents filed for the assignee):

Daisuke Koba (16 out of 17 patents)

Sachio Takeda (7 out of 10 patents)

Masahiko Mitsui (6 out of 22 patents)

4. Koichi Ichikawa (6 out of 12 patents)

5. Yasuhiro Takahashi (6 out of 16 patents)

6. Tetsuya Osaka (4 out of 38 patents)

7. Hiroyuki Sakamoto (4 out of 24 patents)

8. Shinichiro Ito (4 out of 22 patents)

9. Tamotsu Fukuma (4 out of 5 patents)

10. Shigeki Saito (4 out of 4 patents)

11. Yasushi Nakagiri (4 out of 26 patents)

12. Katsunori Maegawa (3 out of 12 patents)

13. Naoshi Akamine (3 out of 3 patents)

14. Yasushi Matsukawa (3 out of 7 patents)

15. Yuki Sakito (2 out of 2 patents)

Core Competencies:

Secondary Battery

Electrolyte Supply System

Battery State Estimation

Nickel-Metal Hydride Battery

Battery Voltage Measurement

Welding Mode Determination

Battery Capacity Measurement

Cooling Structure

Battery Module

Rechargeable Battery

Alkaline Battery

Battery Pack Manager

43 patents: Sort by Forward Citations

1. 12412950 - Secondary battery and method of manufacturing the same (2025-09-09),

2. 12224462 - Electrolyte supply system and secondary battery using same (2025-02-11),

3. 12027726 - Secondary battery manufacturing method and secondary battery (2024-07-02),

4. 12002942 - Method for manufacturing rechargeable battery (2024-06-04),

5. 12002934 - Method and device for determining state of rechargeable battery (2024-06-04),

6. 11909249 - Power feeding system (2024-02-20),

7. 11884180 - Battery system and method of controlling battery system (2024-01-30),

8. 11289754 - Cooling structure of battery pack (2022-03-29),

9. 11271215 - Metal porous body and current collector for nickel-metal hydride battery (2022-03-08),

10. 11223068 - Manufacturing method of compacted strip-shaped electrode plate, compacted strip-shaped electrode plate, and battery (2022-01-11),

11. 11217867 - Manufacturing method for secondary battery and manufacturing apparatus for secondary battery (2022-01-04),

12. 10976372 - Battery state estimation device and battery state estimation method (2021-04-13),

13. 10895602 - Battery assembly state estimation device and battery assembly state estimation method (2021-01-19),

14. 10658660 - Nickel-metal hydride battery (2020-05-19),

15. 10605871 - Method and device for determining state of rechargeable battery (2020-03-31),

Primearth EV Energy Co., Ltd. is a leading manufacturer of nickel-metal hydride (NiMH) batteries, which are used in various applications including electric vehicles (EVs) and hybrid electric vehicles (HEVs). The company focuses on developing and producing advanced batteries that contribute to the reduction of CO2 emissions and the promotion of sustainable mobility. Primearth EV Energy Co., Ltd. aims to provide innovative solutions that meet the growing demand for eco-friendly energy sources and support the transition towards a low-carbon society.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

43 Patents

#1 in Kosai

#1,844 in Japan

#15,578 in the World

Primearth Ev Energy Co., Ltd.

Forward Citations = 91

107 inventors:

Daisuke Koba (16 out of 17 patents)

Sachio Takeda (7 out of 10 patents)

Masahiko Mitsui (6 out of 22 patents)

4. Koichi Ichikawa (6 out of 12 patents)

5. Yasuhiro Takahashi (6 out of 16 patents)

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