Dry erasable projection article and system

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United States of America Patent

PATENT NO 8220932
APP PUB NO 20100171929A1
SERIAL NO

12684565

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Abstract

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A communication article and system comprising a writing member having a dry erasable front surface and a projection member is disclosed. The projection member includes an asymmetric optical diffuser that scatters light in a first direction with a first viewing angle AH, and in a second direction orthogonal to the first direction with a second viewing angle AV. The ratio AH/AV is at least about 2.

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Patent Owner(s)

Patent OwnerAddress
3M INNOVATIVE PROPERTIES COMPANYP O BOX 33427 SAINT PAUL MN 55133-3427

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bastiaens, Willem V Medina, US 12 209
Gustafson, Frederick J Bloomington, US 10 98
Hao, Encai Woodbury, US 74 980
Liu, Lan H Rosemount, US 33 461
Liu, Yufeng Woodbury, US 51 305
Yang, Yu Eden Prairie, US 418 2827
Yust, David T Woodbury, US 36 308

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