Portable electronic display device with automatic lockout of...

Computer graphics processing and selective visual display system – Plural display systems

Reexamination Certificate

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Details

C345S001300, C345S901000, C040S610000

Reexamination Certificate

active

07737912

ABSTRACT:
A portable electronic display device includes an electronic display surface having at least one display panel that displays a graphical and/or textual message, memory that stores a plurality of the messages, and one or more switches on the device that allow user selection of one of the messages. The device further includes a controller that disables the one or more switches if none of the switches are selected after a predetermined period of time after power is turned on to the display device, or if none of the switches are selected after a predetermined period of time subsequent to the last switch selection occurrence. In this manner, a person is prevented from subsequently changing the message via the one or more switches.

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