| 摘要 |
A message board having multiple surfaces connected together such that they are rotatable with respect to one or more axes. In its simplest design, the message board includes two surfaces rotatable around a single axis. The first surface includes a set of messages arranged on its front face in a predefined pattern. The second surface is stacked over the front face of the first surface, covering the set of messages on the front face of the first surface. The second surface includes one or more windows that allow selection and display of a subset of the messages available on the first surface as the two surfaces are rotated with respect to each other. In other embodiments, the message board includes additional stacked surfaces that may include messages and/or windows, wherein proper alignment and relative rotation of the plurality of surfaces reveal selected messages distributed over the surfaces. The message board of the invention provides a fast efficient method of selecting and displaying a subset of available messages distributed over the message board surfaces. Persistently exposed areas of the surfaces or persistently exposed additional surfaces may also be provided to allow persistent display of advertisements, customized names and/or logos, or other text and/or images. The message board may include means by which it can be attached to surfaces to assist in the persistent display of the messages and advertisement.
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