For the Inventor, By the Inventor

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Seiko Optical Products Co., Ltd.

USPTO Granted Patents = 2

Forward Citations = 25

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5 inventors (with patents filed for the assignee):

Moriyasu Shirayanagi (2 out of 35 patents)

Hiroaki Fujii (1 out of 80 patents)

Toshihide Shinohara (1 out of 25 patents)

4. Tadashi Kaga (1 out of 26 patents)

5. Ayumu Ito (1 out of 12 patents)

2 patents: Sort by Forward Citations

1. 7874673 - Progressive power lens and method of designing the same (2011-01-25),

2. 7445333 - Spectacle lens and spectacles (2008-11-04),

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USPTO Data Jan 1 1976 - Jan 6 2026

2 Patents

#4,058 in Tokyo

#10,966 in Japan

Seiko Optical Products Co., Ltd.

Forward Citations = 25

5 inventors:

Moriyasu Shirayanagi (2 out of 35 patents)

Hiroaki Fujii (1 out of 80 patents)

Toshihide Shinohara (1 out of 25 patents)

4. Tadashi Kaga (1 out of 26 patents)

5. Ayumu Ito (1 out of 12 patents)

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