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For the Inventor, By the Inventor

Kanagawa, Japan

Kazumi Nii

This inventor holds 52 USPTO granted patents and 3 published patent applications and 4 EPO patents, primarily in Organic Electroluminescent Devices (CPC class C09K). Top assignees: Fuji Photo Film Company, Limited, Fujifilm Corporation, Udc Ireland Limited. Active years: 1993-2022.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazumi Nii. Retrieved from https://idiyas.com/inventor/kazumi-nii

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

USPTO Granted Patents = 52 

% Patents Active = 73.1

 

Average Co-Inventor Count = 2.3

ph-index = 8

Forward Citations = 291(Granted Patents)

Forward Citations (Not Self Cited) = 255(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Kanagawa, JP (1993 - 2014)
  • Ashigara, JP (2011 - 2014)
  • Minami-ashigara, JP (1997 - 2015)
  • Kanagawa-ken, JP (2018 - 2022)

Company Filing History:

goldMedal25 out of 16,458 
 
Fuji Photo Film Company, Limited
 patents
silverMedal21 out of 16,949 
 
Fujifilm Corporation
 patents
bronzeMedal5 out of 202 
 
Udc Ireland Limited
 patents
4. 1 out of 28 
 
Fuji Photo Film, Inc.
 patents

Years Active: 1993-2022

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Areas of Expertise:
Organic Electroluminescent Devices
Light-Emitting Materials
Photoelectric Conversion Elements
Iridium Complex
Imaging Devices
Near-Infrared Absorptive Composition
Cationic Compounds
Alizarin Derivative Compounds
Luminescent Device Materials
Electrophotographic Photoreceptors
Triarylamine Compounds
Silver Halide Color Photographic Materials
52 patents (USPTO):Explore Patents
1. 11393989 - Organic electroluminescent devices and metal complex compounds (2022-07-19),
2. 10396299 - Organic electroluminescent devices and metal complex compounds (2019-08-27),
3. 10153444 - Organic electroluminescent devices and metal complex compounds (2018-12-11),
4. 8940415 - Organic electroluminescent devices and metal complex compounds (2015-01-27),
5. 8841651 - Photoelectric conversion element and imaging device (2014-09-23),
6. 8796490 - Method of producing a triarylamine compound (2014-08-05),
7. 8742108 - Light-emitting material comprising orthometalated iridium complex, light-emitting device, high efficiency red light-emitting device, and novel iridium complex (2014-06-03),
8. 8741513 - Method for preparing alizarin derivative compound, novel alizarin derivative compound, surface modification method, photoelectric conversion film, photoelectric conversion element, and electrophotographic photoreceptor (2014-06-03),
9. 8603370 - Near-infrared absorptive composition, near-infrared absorptive coated material, near-infrared absorptive liquid dispersion, near-infrared absorptive ink, printed material, and near-infrared absorptive image-forming composition (2013-12-10),
10. 8303863 - Infrared absorptive compound, and fine particle containing the compound (2012-11-06),
11. 8247964 - Light-emitting material comprising orthometalated iridium complex, light-emitting device, high efficiency red light-emitting device, and novel iridium complex (2012-08-21),
12. 8211553 - Organic electroluminescent devices and metal complex compounds (2012-07-03),
13. 8048535 - Electroluminescent device (2011-11-01),
14. 8039630 - Cationic compound, dye compound and method of using the same, and optical information recording medium (2011-10-18),
15. 8034935 - Light-emitting material comprising orthometalated iridium complex, light-emitting device, high efficiency red light-emitting device, and novel iridium complex (2011-10-11),

Title: The Inventive Journey of Kazumi Nii: Pioneering Organic Electroluminescent Innovations

Introduction: Kazumi Nii, a prolific inventor hailing from Kanagawa, Japan, has made remarkable contributions to the field of organic electroluminescent devices. With a total of 52 patents to his name, Nii's expertise and innovative spirit have propelled the advancements in metal complex compounds and luminescent technologies.

Latest Patents: Nii's latest patents showcase his pioneering work in the development of organic electroluminescent devices. These patents specifically focus on the utilization of metal complex compounds with tridentate- or higher polydentate-chain structure ligands within the organic layers of the devices. This innovative approach enhances the efficiency and performance of the electroluminescent devices, setting new standards in the industry.

Career Highlights: Throughout his career, Kazumi Nii has been associated with prominent companies such as Fuji Photo Film Company, Limited and its successor, Fujifilm Corporation. His tenure at these esteemed organizations provided him with a platform to channel his inventive prowess and drive towards revolutionizing organic electronics.

Collaborations: In his collaborative endeavors, Nii has worked closely with esteemed colleagues such as Tatsuya Igarashi and Keizo Kimura. Together, they have synergized their expertise to push the boundaries of organic electroluminescent technologies, fostering a culture of innovation and excellence in their research and development efforts.

Conclusion: Kazumi Nii's groundbreaking work in the realm of organic electroluminescent devices stands as a testament to his innovative acumen and unwavering dedication to scientific advancement. His patents and collaborations reflect a legacy of ingenuity that continues to inspire future generations of inventors and researchers in the pursuit of cutting-edge technological 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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