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For the Inventor, By the Inventor

Hitachi, Japan

Kazuo Tahara

This inventor holds 51 USPTO granted patents, primarily in Electric Drive Technology (CPC class 3101). Top assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd., Hitachi Car Engineering Co., Ltd.. Active years: 1981-2010.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazuo Tahara. Retrieved from https://idiyas.com/inventor/kazuo-tahara

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 51

% Patents Active = 78.4

Average Co-Inventor Count = 5.6

ph-index = 19

Forward Citations = 1,100(Granted Patents)

Forward Citations (Not Self Cited) = 1,084(Dec 10, 2025)


Inventors with similar research interests:


Company Filing History:

goldMedal47 out of 42,726 
 
Hitachi, Ltd.
 patents
silverMedal6 out of 152 
 
Hitachi Automotive Engineering Co., Ltd.
 patents
bronzeMedal3 out of 248 
 
Hitachi Car Engineering Co., Ltd.
 patents
4. 1 out of 1,430 
 
Agency of Industrial Science and Technology
 patents
5. 1 out of 1,267 
 
Hitachi Koki Co., Ltd.
 patents
6. 1 out of 7 
 
Hitachi Setsubi Engineering Co., Ltd.
 patents
7. 3 out of 834,453 
Other
 patents
where one patent can have more than one assignee

Years Active: 1981-2010

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Areas of Expertise:
Electric Drive Device
Hybrid Vehicle
Motor Control
Brushless Motors
Alternating Current Generator
Vehicle Alternator
PWM Controller
Dynamotor
Vacuum Cleaner
Power Steering Apparatus
DC Rotary Electric Machine
Sliding Current Collector
51 patents (USPTO):Explore Patents
1. 7759837 - Rotating electrical machine (2010-07-20),
2. 7395888 - Vehicle drive device (2008-07-08),
3. 7279855 - Electric drive device for vehicle and hybrid engine/motor-type four wheel drive device (2007-10-09),
4. 7057327 - Vehicular alternator (2006-06-06),
5. 6938713 - Dynamotor of hybrid vehicle, and method of control thereof (2005-09-06),
6. 6833646 - Hybrid car and dynamo-electric machine (2004-12-21),
7. 6653745 - Power source apparatus for a car (2003-11-25),
8. 6626002 - Controller for PWM/PAM motor, air conditioner, and method of motor control (2003-09-30),
9. 6603280 - Motor controller (2003-08-05),
10. 6577022 - Hybrid car and dynamo-electric machine (2003-06-10),
11. 6541880 - Linear motor (2003-04-01),
12. 6479956 - Brushless motor control device and equipment using the control device (2002-11-12),
13. 6462430 - Hybrid car and dynamo-electric machine (2002-10-08),
14. 6337548 - Control apparatus of brushless motor and machine and apparatus using brushless motor (2002-01-08),
15. 6198240 - Motor controller (2001-03-06),

Title: Kazuo Tahara - Pioneering Inventor at Hitachi

Introduction: Kazuo Tahara is a distinguished inventor known for his groundbreaking work at Hitachi in Japan.

Latest Patents: Kazuo Tahara holds several patents in the field of electronics and technology, with his most recent inventions focusing on sustainable energy solutions and advanced semiconductor technologies.

Career Highlights: Throughout his career, Kazuo Tahara has been instrumental in developing cutting-edge products that have revolutionized the industry. His innovative mindset and dedication to research have led to numerous successful projects at Hitachi.

Collaborations: Kazuo Tahara has collaborated with top researchers and engineers in the industry, fostering a culture of innovation and excellence at Hitachi. His teamwork and leadership skills have been key to the success of many projects.

Conclusion: In conclusion, Kazuo Tahara's contributions to the field of technology and electronics have been invaluable. His passion for innovation and commitment to excellence continue to inspire the next generation of inventors.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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