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US5592189A Apparatus for use in offices etc. 失效
办公室使用的装置

Apparatus for use in offices etc.
摘要:
An apparatus for use in offices includes a planar liquid crystal shutter disposed at least a portion of a surface of a housing of the apparatus, the shutter being set to a transparent state or a non-transparent state depending on an input signal supplied thereto, and a controller for applying to the shutter a control signal to control the transparent or non-transparent state thereof.
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