Patent ID: 7540105

Claim:
A readerboard system, comprising: a first panel element, wherein said first panel element can be placed in a readerboard, and wherein a first semiotic element is formed on a first surface of said first panel element; and a second panel element, wherein said second panel element can be placed in said readerboard, wherein a second semiotic element is formed on a first surface of said second panel element, wherein said first and second semiotic elements are complementary such that they combine to form at least a portion of a substantially continuous message when said first and second panel elements are placed adjacent to one another, wherein said first semiotic element comprises at least one of a first portion of a graphic image and a first partial portion of a textual character, and said second semiotic element comprises at least one of a second portion of said graphic image that is a continuation of and complementary to said first portion of a graphic image and a second partial portion of said textual character that is a continuation of and complementary to said first partial portion of said textual character, wherein said first and second panel elements each have top and bottom edges capable of being engaged by track channels provided as part of said readerboard, wherein a bottom edge of said first panel element and a top edge of said second panel element are engaged by track channels of a first track of said readerboard, wherein said first semiotic element and said second semiotic element combine to form said at least a portion of the substantially continuous message without discontinuities when said first and second panel elements are registered with one another separate from the readerboard with the bottom edge of the first panel element and the top edge of the second panel element butted against one another, wherein said first track has a T-shaped cross-section; wherein said first and second panel elements are separated from one another by the first track of said readerboard, wherein a first portion of said substantially continuous message at said bottom edge of said first panel element is obscured by the first track and is not displayed to a viewer when said first panel element is installed in a first row of said readerboard, wherein a second portion of said substantially continuous message at said top edge of said second panel element is obscured by the first track and is not displayed to a viewer when said second panel element is installed in a second row of said readerboard, and wherein said panel elements do not include any protrusions for engaging said track channels of said readerboard.