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David H. Kirkman
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Winchester, GB
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last 30 patents
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Patent Grant
Liquid filled electro-optic display cell with diaphragm seal
Patent number
4,545,650
Issue date
Oct 8, 1985
International Business Machines Corporation
David H. Kirkman
G02 - OPTICS
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Patent Grant
Method and electrolytic display for selectively displaying an image
Patent number
4,526,441
Issue date
Jul 2, 1985
International Business Machines Corporation
Barry F. Dowden
G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
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Patent Grant
Passive display module and system
Patent number
4,436,378
Issue date
Mar 13, 1984
International Business Machines Corporation
David H. Kirkman
G02 - OPTICS