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For the Inventor, By the Inventor

Yokohama, Japan

Kenji Yamada

This inventor holds 109 USPTO granted patents and 11 published patent applications and 9 EPO patents, primarily in Electrochromic Devices (CPC class C09K9-02). Top assignees: Canon Kabushiki Kaisha, Fujitsu Corporation, Fuji Xerox Co., Ltd.. Active years: 1986-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kenji Yamada. Retrieved from https://idiyas.com/inventor/kenji-yamada-fcpcauc7

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

Calculating rank
USPTO Granted Patents = 109 

% Patents Active = 65.1

 

Average Co-Inventor Count = 3.0

ph-index = 11

Forward Citations = 509(Granted Patents)

Forward Citations (Not Self Cited) = 473(Dec 10, 2025)


Inventors with similar research interests:

🔬 See more inventors

Location History:

  • Tokyo-to, JP (2001)
  • Ichihara, JP (1998 - 2003)
  • Futtsu, JP (1998 - 2003)
  • Kasugai, JP (1995 - 2006)
  • Nerima-ku, JP (2006)
  • Futtu, JP (2009 - 2010)
  • Kanagawa pref, JP (2010)
  • Chiyoda-ku, JP (2011)
  • Ebina, JP (2012)
  • Fukuoka, JP (2001 - 2014)
  • Kawasaki, JP (1990 - 2015)
  • Kitakyushu, JP (1986 - 2017)
  • Onojo, JP (2017)
  • Onojou, JP (2017 - 2018)
  • Yokohama Kanagawa, JP (2019 - 2020)
  • Kanagawa, JP (1992 - 2024)
  • Yokohama, JP (2008 - 2024)

Company Filing History:

goldMedal33 out of 93,136 
 
Canon Kabushiki Kaisha
 patents
silverMedal17 out of 39,378 
 
Fujitsu Corporation
 patents
bronzeMedal12 out of 11,665 
 
Fuji Xerox Co., Ltd.
 patents
4. 11 out of 2,411 
 
Fujifilm Business Innovation Corp.
 patents
5. 11 out of 1,140 
 
Kabushiki Kaisha Yaskawa Denki
 patents
6. 9 out of 2,560 
 
Asahi Glass Company, Limited
 patents
7. 7 out of 3,724 
 
Nippon Steel Corporation
 patents
8. 5 out of 28,957 
 
Ricoh Company, Ltd.
 patents
9. 3 out of 53,286 
 
Kabushiki Kaisha Toshiba
 patents
10. 2 out of 154 
 
Fujitsu Vlsi Limited
 patents
11. 1 out of 4,753 
 
Mazda Motor Corporation
 patents
12. 1 out of 37 
 
Tokimec Inc.
 patents
where one patent can have more than one assignee

Years Active: 1986-2026

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Areas of Expertise:
Electrochromic Element
Organic Compound
Image Reading
Display Apparatus
Optical Filter
Lens Unit
Imaging Device
Document Reading
Communication Method
Wireless Communication
Semiconductor Package
Dimming Window
109 patents (USPTO):Explore Patents
1. 12726579 - Image reading device, image forming apparatus, non-transitory computer readable medium storing image reading program, and image reading method comprising a switching mechanism to switch the traveling of light from a light source to an optical path directly irradiating a document or via a traveling change member (2026-09-01),
2. 12687813 - Image forming apparatus having both front and side opening/closing coverings (2026-07-21),
3. 12656717 - Taiwan image processing apparatus having image capturing member (2026-06-16),
4. 12641187 - Image processing apparatus, image processing method, and non-transitory computer readable medium comprising extracting first target image and second target image from a reading target and forming a composite image comprised of a non-glossy region and a glossy region after performing an alignment of target images (2026-05-26),
5. 12500987 - Image reading device, image forming apparatus, non-transitory computer readable medium storing image reading program, and image reading method reducing image reading time by sequentially switching light sources turning on second light source for shorter time than first light source (2025-12-16),
6. 12444096 - Information processing apparatus and non-transitory computer readable medium storing program (2025-10-14),
7. 12441750 - Organic metal complex, organic light-emitting device including the same, display apparatus, imaging apparatus, electronic apparatus, illumination apparatus, and moving object (2025-10-14),
8. 12388936 - Document reading device and image forming apparatus (2025-08-12),
9. 12346049 - Driving device and image forming apparatus (2025-07-01),
10. 12328420 - Document reading device and image forming apparatus (2025-06-10),
11. 12319524 - Sheet containing apparatus and image forming apparatus (2025-06-03),
12. 12078905 - Electrochromic element, optical filter, lens unit, image pickup apparatus, and window member (2024-09-03),
13. 11940704 - Organic compound, and electrochromic element, optical filter, image pickup apparatus, window, and electrochromic mirror containing the same (2024-03-26),
14. 11815778 - Organic compound and electrochromic element (2023-11-14),
15. 11661546 - Electrochromic element, optical filter, lens unit, image pickup apparatus, and window member (2023-05-30),

Title: Kenji Yamada: A Pioneer in Electrochromic Technology

Introduction

Kenji Yamada, an innovative inventor based in Yokohama, Japan, holds an impressive portfolio of 98 patents. His groundbreaking work predominantly focuses on electrochromic elements and optical technologies, making significant strides in both fields. Yamada's inventions have greatly influenced modern technology, particularly in display technologies and smart windows.

Latest Patents

Among his latest patents, Yamada has developed an electrochromic element designed to suppress vertical color separation. This innovative EC element includes a pair of electrodes, a solvent, an anodic electrochromic compound, and a cathodic electrochromic compound. Notably, it stipulates a specific difference in solvation free energy, ensuring the effectiveness of the anodic compound. Furthermore, Yamada's recent contributions include an optical filter, a lens unit, image pickup apparatus, and various window members. He has even proposed organic compounds with distinct formulas to advance the performance of electrochromic devices.

Career Highlights

Yamada has a notable career, having collaborated with reputable companies like Canon and Fujitsu. His contributions in these organizations have played a vital role in shaping the direction of various optical technologies. His work has not only enhanced product lines but has also set industry standards in electrochromic innovation.

Collaborations

Throughout his career, Kenji Yamada has collaborated closely with esteemed colleagues, such as Shinjiro Okada and Satoshi Igawa. These partnerships have allowed for a fusion of ideas and expertise, driving forward advancements in their shared fields. Together, they have explored various applications of electrochromic technology, pushing the boundaries of what is possible.

Conclusion

Kenji Yamada’s extensive experience and innovative mindset have established him as a leading figure in the world of electrochromic technology. With a robust portfolio of patents and noteworthy collaborations, he continues to make valuable contributions to the field. As technology evolves, Yamada's pioneering work will likely inspire future advancements in electrochromic and optical innovations.

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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