% Expired Patents = 50.0

Forward Citations = 38

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6 inventors (with patents filed for the assignee):

Seiji Umemoto (1 out of 99 patents)

Kentarou Takeda (1 out of 47 patents)

Ikuo Kawamoto (1 out of 23 patents)

4. Masanori Sano (1 out of 4 patents)

5. Naomitu Tanaka (1 out of 5 patents)

6. Tatsuo Koyama (1 out of 2 patents)

2 patents: Sort by Forward Citations

1. 7906184 - Optical film, method of producing the same, and image display apparatus using the optical film (2011-03-15),

2. 6457200 - Pressure-sensitive cleaning sheet, image-forming material having cleaning part, and method of cleaning image-forming apparatus (2002-10-01),

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

2 Patents

#78 in Ibaraki

#11,139 in Japan

Ibaraki, Japan

Nitto Denko Corproation

Forward Citations = 38

6 inventors:

Seiji Umemoto (1 out of 99 patents)

Kentarou Takeda (1 out of 47 patents)

Ikuo Kawamoto (1 out of 23 patents)

4. Masanori Sano (1 out of 4 patents)

5. Naomitu Tanaka (1 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nitto Denko Corproation. Retrieved from https://idiyas.com/company/nitto-denko-corporation

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]