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Ishahara Sangyo Kaisha Ltd

USPTO Granted Patents = 1

Forward Citations = 4

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5 inventors (with patents filed for the assignee):

Toru Koyanagi (1 out of 35 patents)

Takahiro Haga (1 out of 62 patents)

Itaru Shigehara (1 out of 18 patents)

4. Masaru Maeda (1 out of 4 patents)

5. Kazutoshi Hara (1 out of 1 patent)

1 patent: Sort by Forward Citations

1. 4861886 - Method for isomerization of trans-form 2-methylspiro (1,3-oxathiolane-5,3') (1989-08-29),

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USPTO Data Jan 1 1976 - Dec 30 2025

1 Patents

#1,487 in Osaka

#15,542 in Japan

Ishahara Sangyo Kaisha Ltd

Forward Citations = 4

5 inventors:

Toru Koyanagi (1 out of 35 patents)

Takahiro Haga (1 out of 62 patents)

Itaru Shigehara (1 out of 18 patents)

4. Masaru Maeda (1 out of 4 patents)

5. Kazutoshi Hara (1 out of 1 patent)

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