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Tadamasa Akutagawa
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Ota-ku, Tokyo 145, JP
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last 30 patents
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Patent Grant
Life indicator and lead-acid storage battery with life indicator
Patent number
5,750,285
Issue date
May 12, 1998
Yuasa Corporation
Tadamasa Akutagawa
H01 - BASIC ELECTRIC ELEMENTS
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Patent Grant
Sulfuric acid concentration sensor for lead storage battery
Patent number
5,485,744
Issue date
Jan 23, 1996
Akutagawa; Tadamasa
Tadamasa Akutagawa
G01 - MEASURING TESTING