Nippon Denko Co., Ltd

Calculating rank

USPTO Granted Patents = 3

EPO Patents = 3

Forward Citations = 4

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11 inventors (with patents filed for the assignee):

Tomoharu Itoh (3 out of 3 patents)

Yusuke Hidaka (1 out of 10 patents)

Shuhei Nagaoka (1 out of 10 patents)

4. Masasuke Yamaba (1 out of 1 patent)

5. Kenji Okamoto (1 out of 1 patent)

6. Hiroki Uede (1 out of 1 patent)

7. Takashi Yamada (1 out of 3 patents)

8. Yasuharu Shingai (1 out of 1 patent)

9. Wataru Nagoh (1 out of 1 patent)

10. Keigo Aihara (1 out of 1 patent)

11. Hirofumi Konno (1 out of 1 patent)

12. Takeshi Watanabe (25 patents)

13. Hirofumi Konno (0 patent)

3 patents: Sort by Forward Citations

1. 11559788 - Oxygen storage and release material, catalyst, exhaust gas purification system, and exhaust gas treatment method (2023-01-24),

2. 10987654 - Ceria-zirconia-based composite oxide oxygen storage material, exhaust gas cleaning catalyst, and honeycomb structure for exhaust gas cleaning (2021-04-27),

3. 10010868 - Ceria-zirconia-based composite oxide and method of production of the same (2018-07-03),

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USPTO Data Jan 1 1976 - Oct 27 2026

3 Patents

#3,552 in Tokyo

#8,938 in Japan

Tokyo, Japan

Nippon Denko Co., Ltd

Forward Citations = 4

11 inventors:

Tomoharu Itoh (3 out of 3 patents)

Yusuke Hidaka (1 out of 10 patents)

Shuhei Nagaoka (1 out of 10 patents)

4. Masasuke Yamaba (1 out of 1 patent)

5. Kenji Okamoto (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nippon Denko Co., Ltd. Retrieved from https://idiyas.com/company/nippon-denko-company

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

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]

3 patents (EPO):

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]