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Yokohama, Japan

Tsuyoshi Yamada

USPTO Granted Patents = 2

Average Co-Inventor Count = 1.8

ph-index = 2

Forward Citations = 15(Granted Patents)

Company Filing History:

Showa Denko Kabushiki Kaisha

Showa Denko K.k.

Erma Optical Works, Ltd.

where one patent can have more than one assignee

Years Active: 1978-1981

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2 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4290776 - Method for analyzing acidic substances by high speed liquid (1981-09-22),

2. 4126393 - High-sensitivity differential refractometer (1978-11-21),

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