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Electrochromic element
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Issue date Mar 17, 1992
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Toyoda Gosei Co., Ltd.
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Electrochromic element
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Issue date May 14, 1991
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Toyoda Gosei Co., Ltd.
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Toshiyasu Ito
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G02 - OPTICS
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Patent number 4,874,229
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Issue date Oct 17, 1989
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Toyoda Gosei Co., Ltd.
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Toshiyasu Ito
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Patent number 4,832,468
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Issue date May 23, 1989
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Toyoda Gosei Co., Ltd.
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Toshiyasu Ito
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Patent number 4,603,065
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Issue date Jul 29, 1986
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Toyoda Gosei Co., Ltd.
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Takaaki Mori
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