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For the Inventor, By the Inventor

Tokyo, Japan

Chemical Grout Company, Ltd.


USPTO Granted Patents = 2

Forward Citations = 75

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2 inventors (with patents filed for the assignee):

goldMedal Teruo Yahiro (2 out of 3 patents)

silverMedal Hiroshi Yoshida (2 out of 8 patents)


2 patents:

1. 4084648 - Process for the high-pressure grouting within the earth and apparatus (1978-04-18),
2. 4047580 - High-velocity jet digging method (1977-09-13),
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USPTO Data Jan 1 1976 - Jan 6 2026

2 Patents

#4,058 in Tokyo

#10,966 in Japan

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Tokyo, Japan

Chemical Grout Company, Ltd.

Forward Citations = 75

2 inventors:

goldMedal Teruo Yahiro (2 out of 3 patents)

silverMedal Hiroshi Yoshida (2 out of 8 patents)

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