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National Research Institute for Earth Science and Disaster Prevention

USPTO Granted Patents = 3

Forward Citations = 8

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4 inventors (with patents filed for the assignee):

Kozo Takahashi (2 out of 23 patents)

Yukio Fujinawa (2 out of 5 patents)

Takumi Matsumoto (1 out of 63 patents)

4. Masaki Tominaga (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 6885945 - Method for estimating origin time, hypocentral distance, and scale based on electric field observation, and apparatus for prediction (2005-04-26),

2. 6507201 - System for measuring amount of specific substance mixed in material under measurement and electrode rod for measurement (2003-01-14),

3. 4961143 - Method of predicting volcanic eruptions (1990-10-02),

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USPTO Data Jan 1 1976 - Dec 30 2025

3 Patents

#15 in Tsukuba

#8,767 in Japan

National Research Institute for Earth Science and Disaster Prevention

Forward Citations = 8

4 inventors:

Kozo Takahashi (2 out of 23 patents)

Yukio Fujinawa (2 out of 5 patents)

Takumi Matsumoto (1 out of 63 patents)

4. Masaki Tominaga (1 out of 1 patent)

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