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For the Inventor, By the Inventor

Hitachi, Japan

Kenji Yamaga

USPTO Granted Patents = 18 


Average Co-Inventor Count = 3.9

ph-index = 4

Forward Citations = 53(Granted Patents)


Company Filing History:

goldMedal18 out of 42,517 
 
Hitachi, Ltd.
 patents

Years Active: 2003-2014

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18 patents (USPTO):Explore Patents
1. 8647784 - Fuel cell stack start method preventing cathode deterioration (2014-02-11),
2. 8257874 - Fuel cell with cooling method at start up (2012-09-04),
3. 8197987 - Separator for fuel cell (2012-06-12),
4. 8137856 - Fuel cell (2012-03-20),
5. 7745035 - Separator and fuel cell using thereof (2010-06-29),
6. 7745032 - Fuel cell with humidifier (2010-06-29),
7. 7678486 - Separator for fuel cell and fuel cell containing the separator (2010-03-16),
8. 7560185 - Solid polymer electrolyte, a membrane using thereof, a solution for coating electrode catalyst, a membrane/electrode assembly, and a fuel cell (2009-07-14),
9. 7553574 - Solid polymer electrolyte, a membrane using thereof, a solution for coating electrode catalyst, a membrane/electrode assembly, and a fuel cell (2009-06-30),
10. 7541107 - Solid polyelectrolyte, assembly of membrane and electrodes, amd fuel cell (2009-06-02),
11. 7320841 - Fuel cell and separator structure used therein (2008-01-22),
12. 7279244 - Fuel cell, polyelectrolyte and ion-exchange resin use for same (2007-10-09),
13. 7022743 - Fuel cell, polyelectrolyte and ion-exchange resin used for same (2006-04-04),
14. 6989212 - Fuel cell, polyelectrolyte and ion-exchange resin used for same (2006-01-24),
15. 6964823 - Solid polymer electrolyte, a membrane using thereof, a solution for coating electrode catalyst, a membrane/electrode assembly, and a fuel cell (2005-11-15),

Title: Kenji Yamaga: Innovator in Fuel Cell Technology

Introduction

Kenji Yamaga is a prominent inventor based in Hitachi, Japan. He has made significant contributions to the field of fuel cell technology, holding a total of 18 patents. His innovative approaches have paved the way for advancements in energy efficiency and sustainability.

Latest Patents

One of his latest patents is a fuel cell stack start method that prevents cathode deterioration. This method allows for the avoidance of output reduction in the fuel cell stack without relying on the oxidation and reduction conditions of the anode. The process involves several steps, including feeding fuel to the stack while the cathode is covered by generated water, forming an oxide layer on the cathode, feeding oxidant gas, and extracting load current from the stack. Another notable patent is a fuel cell with a cooling method at startup. This system includes various sensors and a controller that manages the operation of a cooling water pump, fan, and bypass valve based on real-time measurements of temperature, voltage, and current.

Career Highlights

Kenji Yamaga works at Hitachi, Ltd., where he has been instrumental in developing cutting-edge fuel cell technologies. His work has not only advanced the capabilities of fuel cells but has also contributed to the broader field of renewable energy solutions.

Collaborations

Throughout his career, Kenji has collaborated with notable colleagues, including Tomoichi Kamo and Toshiyuki Kobayashi. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.

Conclusion

Kenji Yamaga's contributions to fuel cell technology exemplify the spirit of innovation. His patents reflect a commitment to improving energy systems and addressing the challenges of sustainable energy. His work continues to inspire advancements in the field.

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