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Trademarks = 20

Forward Citations = 151

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8 inventors (with patents filed for the assignee):

Jumpei Tsuda (3 out of 3 patents)

JaeYoung Kim (2 out of 2 patents)

Yoichi Erikawa (2 out of 2 patents)

4. Junpei Tsuda (1 out of 2 patents)

5. Takao Kato (1 out of 38 patents)

6. Takashi Atsumi (1 out of 1 patent)

7. Tomokazu Takeda (1 out of 1 patent)

8. Satoshi Nakamura (1 out of 48 patents)

5 patents: Sort by Forward Citations

1. 7104890 - Program, recording medium, game character rendering method, and game apparatus (2006-09-12),

2. 6894688 - Program, recording medium, rendering method and rendering apparatus (2005-05-17),

3. 6736724 - Character group battle method, recording medium and game device (2004-05-18),

4. 6729954 - Battle method with attack power based on character group density (2004-05-04),

5. 6525736 - Method for moving grouped characters, recording medium and game device (2003-02-25),

Koei Co., Ltd. is a Japanese video game developer and publisher known for their historical simulation games such as the Romance of the Three Kingdoms and Nobunaga's Ambition series. Founded in 1978, the company has since expanded its portfolio to include various genres of games on multiple platforms. Koei Co., Ltd. continues to be a prominent player in the gaming industry with a strong focus on delivering immersive gaming experiences to players worldwide.

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USPTO Data Jan 1 1976 - Jan 6 2026

5 Patents

#83 in Yokohama

#6,491 in Japan

Yokohama, Japan

Koei Co., Ltd.