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For the Inventor, By the Inventor

Tokyo, Japan

Meidensha Corporation


USPTO Granted Patents = 312

% Expired Patents = 20.8



Trademarks = 5

Forward Citations = 779

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302 inventors (with patents filed for the assignee):

goldMedal Takao Akiyama (31 out of 38 patents)

silverMedal Toshimichi Takahashi (20 out of 21 patents)

bronzeMedal Nobuo Okazaki (16 out of 17 patents)

4.  Yugo Tadano (15 out of 15 patents)

5.  Takashi Yamaguchi (14 out of 89 patents)

6.  Akihiko Kodama (13 out of 13 patents)

7.  Toshinori Miura (11 out of 12 patents)

8.  Shota Hayashi (11 out of 11 patents)

9.  Keita Ishikawa (11 out of 30 patents)

10.  Kosuke Hasegawa (10 out of 10 patents)

11.  Kaoru Kitakizaki (10 out of 11 patents)

12.  Kazunobu Oi (10 out of 10 patents)

13.  Toshimasa Fukai (9 out of 20 patents)

14.  Yuji Ogawa (9 out of 35 patents)

15.  Masayasu Kanke (9 out of 11 patents)


Core Competencies:
Rotary Electric Machine
Power Conversion Device
Filtration System
Dynamometer System
Vacuum Interrupter
Vehicle Speed Control
Field Emission Device
Chassis Dynamometer
Elevator Monitoring
Bubble Generation Device
Atomic Layer Deposition
Motor Cooling System

312 patents:

1. 12734898 - Vehicle drive device (2026-09-15),
2. 12712462 - BIDIRECTIONAL ISOLATED DC- DC CONVERTER HAVING REDUCED VOLTAGE INCREASE FOR LEAKAGE INDUCTANCE OF TRANSFORMER (2026-08-18),
3. 12700548 - Vacuum capacitor (2026-08-04),
4. 12676515 - Rotary electric machine (2026-07-07),
5. D1127724 - Electric drive unit (2026-05-26),
6. 12630394 - Elevator rope inspection device and method for inspecting an elevator rope (2026-05-19),
7. D1119489 - Wheel fixing device (2026-03-24),
8. 12573899 - Rotary electric machine (2026-03-10),
9. 12549060 - Coolant flow passage structure in rotating machine (2026-02-10),
10. 12463497 - Rotating electrical machine (2025-11-04),
11. 12451755 - Rotary electric machine with stator and oil injection port (2025-10-21),
12. 12442702 - Dynamometer system (2025-10-14),
13. 12442427 - Reverse force mechanism (2025-10-14),
14. 12441182 - Vehicle speed control device and driver model processing device (2025-10-14),
15. 12440811 - Bubble generation device and liquid filtration device (2025-10-14),
MEIDENSHA CORPORATION is a Japanese electrical engineering company that specializes in the manufacturing and distribution of electrical products and systems. With a history dating back to 1897, the company offers a wide range of products including power generation and transmission equipment, industrial machinery, and social infrastructure systems. MEIDENSHA also provides various engineering services and solutions to cater to the diverse needs of its clients. For more information about the company and its offerings, please visit their official website.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Sep 15 2026

Meidensha Corporation
312 Patents

#275 in Tokyo

#530 in Japan

#2,861 in the World

Tokyo, JP
Tokyo, Japan

Meidensha Corporation

Forward Citations = 779

302 inventors:

goldMedal Takao Akiyama (31 out of 38 patents)

silverMedal Toshimichi Takahashi (20 out of 21 patents)

bronzeMedal Nobuo Okazaki (16 out of 17 patents)

4.  Yugo Tadano (15 out of 15 patents)

5.  Takashi Yamaguchi (14 out of 89 patents)

Please report any incorrect information to [email protected]
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