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For the Inventor, By the Inventor

Tokyo, Japan

Fdk Corporation


USPTO Granted Patents = 220

% Expired Patents = 21.8



Trademarks = 5

Forward Citations = 801

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330 inventors (with patents filed for the assignee):

goldMedal Fumiaki Nakao (16 out of 32 patents)

silverMedal Mikio Kitaoka (15 out of 16 patents)

bronzeMedal Yukihiro Yamamoto (10 out of 16 patents)

4.  Hirotaka Kawai (10 out of 23 patents)

5.  Hiromitsu Umezawa (10 out of 11 patents)

6.  Yasunari Mizoguchi (9 out of 9 patents)

7.  Masaru Kihara (9 out of 32 patents)

8.  Norio Fukui (9 out of 9 patents)

9.  Tetsuya Suzuki (9 out of 50 patents)

10.  Akira Saguchi (9 out of 13 patents)

11.  Daisuke Hirata (8 out of 14 patents)

12.  Jun Ishida (8 out of 25 patents)

13.  Naoaki Nishimura (8 out of 11 patents)

14.  Kenji Kitamura (8 out of 60 patents)

15.  Katsuo Yamada (8 out of 8 patents)


Core Competencies:
Battery Packaging
Alkaline Batteries
Charging Systems
Backup Power Supply
Battery Voltage Equalization
Nickel Metal Hydride
All-Solid-State Battery
Power Supply Systems
Battery Electrode
Charging Devices
Battery Management
Energy Storage

220 patents:

1. 12748150 - Power storage control apparatus, power storage apparatus, remaining charge time computing method, and non-transitory computer-readable storage medium storing remaining charge time computing program (2026-09-29),
2. 12693947 - Control device and method for rewriting control program (2026-07-28),
3. D1135804 - Battery with terminals (2026-07-21),
4. D1134144 - Battery pair with terminals (2026-07-14),
5. D1126753 - Battery packaging container (2026-05-19),
6. 12627014 - Alkaline storage battery (2026-05-12),
7. D1121433 - Battery packaging container (2026-04-07),
8. 12580410 - Charging method and backup power supply device (2026-03-17),
9. 12580236 - Battery pack, charging system, and method for charging battery pack (2026-03-17),
10. 12573693 - Sealing body and battery (2026-03-10),
11. 12567755 - Battery bank unit, remaining charge time calculation method, and remaining charge time calculation program (2026-03-03),
12. 12552288 - Battery voltage equalization device (2026-02-17),
13. 12549021 - Battery voltage equalization device (2026-02-10),
14. 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),
15. 12482820 - Negative electrode for alkaline storage battery and alkaline storage battery including the negative electrode (2025-11-25),
FDK Corporation is a global leader in the development and manufacture of high-quality electronic components and energy storage devices. With a wide range of products including batteries, magnets, and capacitors, FDK Corporation serves various industries such as automotive, telecommunications, and healthcare. With a strong focus on innovation and customer satisfaction, FDK Corporation continuously strives to deliver cutting-edge solutions that meet the ever-evolving needs of the market.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Sep 29 2026

Fdk Corporation
220 Patents

#329 in Tokyo

#663 in Japan

#3,880 in the World

Tokyo, JP
Tokyo, Japan

Fdk Corporation

Forward Citations = 801

330 inventors:

goldMedal Fumiaki Nakao (16 out of 32 patents)

silverMedal Mikio Kitaoka (15 out of 16 patents)

bronzeMedal Yukihiro Yamamoto (10 out of 16 patents)

4.  Hirotaka Kawai (10 out of 23 patents)

5.  Hiromitsu Umezawa (10 out of 11 patents)

Please report any incorrect information to [email protected]
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