Trademarks = 1

Forward Citations = 51

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4 inventors (with patents filed for the assignee):

Toshiyuki Sato (4 out of 23 patents)

Hirotoki Kawasaki (4 out of 5 patents)

George Sakamoto (4 out of 5 patents)

4. Morikuni Takigawa (4 out of 4 patents)

4 patents: Sort by Forward Citations

1. 5678560 - Brain-wave analysis method and apparatus (1997-10-21),

2. 5470081 - Control-signal input device for computer game machines (1995-11-28),

3. 5460184 - Mental-concentration measuring method and apparatus (1995-10-24),

4. 5415174 - Filter-coefficient conversion system (1995-05-16),

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Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

4 Patents

#2,781 in Tokyo

#7,421 in Japan

Tokyo, Japan

Dfc Co. Ltd.

Forward Citations = 51

4 inventors:

Toshiyuki Sato (4 out of 23 patents)

Hirotoki Kawasaki (4 out of 5 patents)

George Sakamoto (4 out of 5 patents)

4. Morikuni Takigawa (4 out of 4 patents)

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