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Shizuoka-ken, Japan

Kokusan Denki Co., Ltd.

USPTO Granted Patents = 180

EPO Patents = 3

Forward Citations = 1,347

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131 inventors (with patents filed for the assignee):

Kazuyoshi Kishibata (27 out of 27 patents)

Masanori Nakagawa (20 out of 21 patents)

Hiroyasu Sato (16 out of 16 patents)

4. Tsuneaki Endou (16 out of 16 patents)

5. Yutaka Inaba (15 out of 16 patents)

6. Yuichi Kitagawa (14 out of 14 patents)

7. Mitsuyoshi Shimazaki (12 out of 12 patents)

8. Kaoru Shinba (12 out of 12 patents)

9. Yoshinobu Arakawa (12 out of 12 patents)

10. Shuichi Muramatsu (10 out of 10 patents)

11. Kouji Sasaki (10 out of 10 patents)

12. Hidetoshi Suzuki (9 out of 9 patents)

13. Akira Shimoyama (9 out of 9 patents)

14. Masahiko Endou (9 out of 9 patents)

15. Narutoshi Aoki (9 out of 9 patents)

Core Competencies:

Battery Charging Device

Internal Combustion Engine

Electric Pump

Power Supply Unit

Permanent Magnet Motor

Torque Ripple Suppression

Marine Engine Control

Resin Sealing Semiconductor

Capacitor Discharge Ignition

Fuel Injection Control

Electric Rotating Machine

Vehicle-Mounted Power Generator

180 patents: Sort by Forward Citations

1. 9941728 - Battery charging device (2018-04-10),

2. 9739250 - Internal combustion engine ignition device (2017-08-22),

3. 9726174 - Electric pump (2017-08-08),

4. 9328712 - Control device for internal combustion engine (2016-05-03),

5. 9216685 - Power supply unit control device for internal combustion engine driven vehicle and internal combustion engine driven vehicle equipped with power supply unit control device (2015-12-22),

6. 8810052 - Control device for rotary electrical machine (2014-08-19),

7. 8779701 - Control apparatus for permanent magnet motor (2014-07-15),

8. 8779644 - Rotating electrical machine and method for manufacturing a stator thereof (2014-07-15),

9. 8736233 - Power source device (2014-05-27),

10. 8656882 - Engine ignition control device (2014-02-25),

11. 8410735 - Torque ripple suppression control device for permanent magnet motor and electric power steering system (2013-04-02),

12. 8115289 - Onboard electric power control device (2012-02-14),

13. 8056536 - Ignition device for internal combustion engine (2011-11-15),

14. 8027180 - Power generating apparatus (2011-09-27),

15. 7891330 - Engine starting method and device (2011-02-22),

Kokusuan Denki Co., Ltd. is a Japanese company specializing in the manufacturing and distribution of electrical appliances. With over 100 years of experience, KOKUSAN DENKI is known for its high-quality products and innovative technologies. The company offers a wide range of appliances including fans, air purifiers, ventilating equipment, lighting fixtures, and more. KOKUSAN DENKI is committed to providing reliable and efficient solutions for residential, commercial, and industrial applications.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

180 Patents

#4 in Shizuoka-ken

#740 in Japan

#4,506 in the World

Shizuoka-ken, Japan

Kokusan Denki Co., Ltd.

Forward Citations = 1,347

131 inventors:

Kazuyoshi Kishibata (27 out of 27 patents)

Masanori Nakagawa (20 out of 21 patents)

Hiroyasu Sato (16 out of 16 patents)

4. Tsuneaki Endou (16 out of 16 patents)

5. Yutaka Inaba (15 out of 16 patents)

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