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Kathy E. Siegrist
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Grand Rapids, MI, US
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Patents Grants
last 30 patents
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Patent Grant
Electrochromic layer and devices comprising same
Patent number
6,248,263
Issue date
Jun 19, 2001
Gentex Corporation
William L. Tonar
G02 - OPTICS
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Patent Grant
Electrochromic medium capable of producing a pre-selected color
Patent number
6,020,987
Issue date
Feb 1, 2000
Gentex Corporation
Kelvin L. Baumann
B32 - LAYERED PRODUCTS
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Patent Grant
Electrochromic layer and devices comprising same
Patent number
5,928,572
Issue date
Jul 27, 1999
Gentex Corporation
William L. Tonar
G02 - OPTICS
Information
Patent Grant
Electrochromic layer and devices comprising same
Patent number
5,888,431
Issue date
Mar 30, 1999
Gentex Corporation
William L. Tonar
G02 - OPTICS
Patents Applications
last 30 patents
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Patent Application
Electrochromic layer and devices comprising same
Publication number
20010042855
Publication date
Nov 22, 2001
William L. Tonar
G02 - OPTICS