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Nippon Densan Corporation

USPTO Granted Patents = 51

Trademarks = 6

Forward Citations = 971

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58 inventors (with patents filed for the assignee):

Hiroyuki Yonei (10 out of 14 patents)

Kihachiro Ohta (7 out of 7 patents)

Itsuo Miyaji (7 out of 7 patents)

4. Kuniyasu Iwazaki (5 out of 5 patents)

5. Isao Kaneda (5 out of 9 patents)

6. Noriaki Hishida (4 out of 4 patents)

7. Takeshi Uda (4 out of 4 patents)

8. Masanobu Chuta (4 out of 4 patents)

9. Fumihiro Morikawa (4 out of 4 patents)

10. Yoichi Mori (3 out of 4 patents)

11. Yosuke Kawate (3 out of 3 patents)

12. Shuji Takahashi (3 out of 7 patents)

13. Shinobu Hattori (3 out of 3 patents)

14. Kiyoyoshi Takegami (3 out of 3 patents)

15. Toshio Fukuda (2 out of 12 patents)

Core Competencies:

Heat Sink Fan

Charge Controller

Spindle Motor

Hydrodynamic Motor

Disk Drive Apparatus

Magnetic Fluid Seal

Brushless DC Motor

Micropump

Torque Transducer

Battery Charger

Magnetic Recording Device

Motor Drive Control

51 patents: Sort by Forward Citations

1. 5484013 - Heat sink fan (1996-01-16),

2. 5475294 - Charge controller for battery charger (1995-12-12),

3. 5459361 - Spindle motor (1995-10-17),

4. 5457588 - Low profile hydrodynamic motor having minimum leakage properties (1995-10-10),

5. 5453890 - Low airflow hard disk apparatus (1995-09-26),

6. 5452156 - Spindle motor with combined pressure relief and adhesive carrying (1995-09-19),

7. 5436519 - Fan motor (1995-07-25),

8. 5428284 - Method of and circuit for starting sensorless motor (1995-06-27),

9. 5426548 - Disk clamping assembly for a low profile disk drive apparatus (1995-06-20),

10. 5412367 - Transformer (1995-05-02),

11. 5402023 - Spindle motor and magnetic fluid seal apparatus used therefor (1995-03-28),

12. 5396159 - Method of starting a motor (1995-03-07),

13. 5396135 - Motor (1995-03-07),

14. 5381066 - Spindle motor with a sealing member (1995-01-10),

15. 5365458 - Motor eccentricity measuring apparatus (1994-11-15),

Nippon Densan Corporation is a leading manufacturer of electrical equipment in Japan. With over 50 years of experience in the industry, we provide high-quality products and services to our customers. Our offerings include transformers, switchgear, and power distribution systems. We strive for excellence in all that we do and are committed to delivering innovative solutions to meet the needs of our clients.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 2 2025

51 Patents

#48 in Kyoto

#1,649 in Japan

#13,352 in the World

Nippon Densan Corporation

Forward Citations = 971

58 inventors:

Hiroyuki Yonei (10 out of 14 patents)

Kihachiro Ohta (7 out of 7 patents)

Itsuo Miyaji (7 out of 7 patents)

4. Kuniyasu Iwazaki (5 out of 5 patents)

5. Isao Kaneda (5 out of 9 patents)

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