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For the Inventor, By the Inventor

Kariya, Japan

Keiji Toh

This inventor holds 27 USPTO granted patents and 2 published patent applications and 3 EPO patents, primarily in Hydrogen Technologies. Top assignees: Kabushiki Kaisha Toyota Jidoshokki, Toyota Jidosha Kabushiki Kaisha, Showa Denko K.k.. Active years: 1997-2015.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keiji Toh. Retrieved from https://idiyas.com/inventor/keiji-toh

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

Calculating rank
USPTO Granted Patents = 27 

% Patents Active = 29.6

 

Average Co-Inventor Count = 4.9

ph-index = 8

Forward Citations = 252(Granted Patents)


Location History:

  • Aichi, JP (2006)
  • Aichi-ken, JP (2012)
  • Kariya, JP (1997 - 2015)

Company Filing History:

goldMedal18 out of 1,908 
 
Kabushiki Kaisha Toyota Jidoshokki
 patents
silverMedal9 out of 39,078 
 
Toyota Jidosha Kabushiki Kaisha
 patents
bronzeMedal7 out of 1,961 
 
Showa Denko K.k.
 patents
4. 3 out of 1,343 
 
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
 patents
5. 2 out of 1,154 
 
Kabushiki Kaisha Toyota Chuo Kenkyusho
 patents
6. 1 out of 2 
 
Kabushiki Kaisha Toshiba Jidoshokki
 patents
7. 2 out of 834,659 
Other
 patents
where one patent can have more than one assignee

Years Active: 1997-2015

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Areas of Expertise:
Hydrogen Generator
Fuel Cell System
Hydrogen Storage Tank
Semiconductor Device
Heat Sink
Power Module
Hydrogen Filling System
Pressure Tank
Heat Radiator
Manufacturing Method
Gas Storage Apparatus
Indirect Heat Exchanger
27 patents (USPTO):Explore Patents
1. 9162203 - Hydrogen generator (2015-10-20),
2. 8824144 - Base for power module (2014-09-02),
3. 8752596 - Hydrogen filling system and hydrogen filling method (2014-06-17),
4. 8657920 - Apparatus for purifying hydrogen and method for using the same (2014-02-25),
5. 8475722 - Hydrogen generation device and method of using same (2013-07-02),
6. 8411438 - Heat sink for power module (2013-04-02),
7. 8387685 - Heat sink for power module (2013-03-05),
8. 8299606 - Semiconductor device includes a ceramic substrate and heat sink (2012-10-30),
9. 8283773 - Semiconductor device having anti-warping sheet (2012-10-09),
10. 8198539 - Heat radiator and power module (2012-06-12),
11. 8102652 - Base for power module (2012-01-24),
12. 8030760 - Semiconductor apparatus and manufacturing method thereof (2011-10-04),
13. 7923833 - Semiconductor module (2011-04-12),
14. 7875107 - Hydrogen storage tank and its manufacturing method (2011-01-25),
15. 7569929 - Semiconductor device (2009-08-04),

Title: The Innovative Journey of Keiji Toh

Introduction: Keiji Toh is a renowned inventor hailing from Kariya, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Keiji Toh holds several patents in the automotive industry, particularly in the development of electric vehicle technologies and autonomous driving systems.

Career Highlights: Throughout his illustrious career, Keiji Toh has worked with leading automotive companies in Japan, spearheading research and development projects that have revolutionized the industry.

Collaborations: Keiji Toh has collaborated with top engineers and researchers from around the world, fostering a culture of innovation and excellence in all his projects.

Conclusion: Keiji Toh's dedication to pushing the boundaries of technology and his relentless pursuit of innovation continue to inspire the next generation of inventors and engineers globally.

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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