% Expired Patents = 75.0

EPO Patents = 1

Forward Citations = 4

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9 inventors (with patents filed for the assignee):

Yusei Miyamoto (3 out of 3 patents)

Naoki Toshima (2 out of 7 patents)

Masashi Kajita (2 out of 2 patents)

4. Takao Asano (1 out of 1 patent)

5. Noboru Naito (1 out of 1 patent)

6. Kumi Kameyama (1 out of 1 patent)

7. Akemi Takayama (1 out of 1 patent)

8. Misako Kobayashi (1 out of 3 patents)

9. Yoshihiko Awa (1 out of 1 patent)

10. Minenobu Okayama (0 patent)

11. Kenichi Koshiro (0 patent)

4 patents: Sort by Forward Citations

1. 7838043 - Superoxide anion decomposing agent (2010-11-23),

2. 7588747 - Singlet oxygen quencher and composition using the same (2009-09-15),

3. 7452554 - Platinum nanocolloid solution, process for producing the same and drink containing platinum nanocolloid (2008-11-18),

4. 6739741 - Display device by columnar light (2004-05-25),

Company Overview

Apt Co., Ltd is a leading provider of innovative technology solutions for businesses. With a strong focus on customer satisfaction, Apt Co. offers a wide range of services including IT consulting, software development, and data analytics. Our team of experts is dedicated to helping our clients achieve their business goals through cutting-edge technology solutions.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

4 Patents

#3,053 in Tokyo

#7,579 in Japan

Tokyo, Japan

Apt Co., Ltd

Forward Citations = 4

9 inventors:

Yusei Miyamoto (3 out of 3 patents)

Naoki Toshima (2 out of 7 patents)

Masashi Kajita (2 out of 2 patents)

4. Takao Asano (1 out of 1 patent)

5. Noboru Naito (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Apt Co., Ltd. Retrieved from https://idiyas.com/company/apt-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]

1 patent (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]