Patent ID: 8021157

Claim:
A tactile code for visually impaired persons, said tactile code comprising: a plurality of tactile perceptible cells, wherein each character of an alphabet is represented by one cell of the plurality of tactile perceptible cells and each one cell has a specific raised pattern, wherein a cell of the plurality of tactile perceptible cells comprises: a first region having a plurality of positions for use in indicating a plurality of lead characters, wherein a lead character of the plurality of lead characters is the lead character in a specific sequence of characters of the alphabet; a second region having a plurality of positions different from the plurality of positions of the first region, the plurality of positions in the second region for use in indicating a particular character from a set of characters of the alphabet, the set of characters including the lead character and a number of characters following the lead character in alphabetical order, said number of characters being less than the number of characters in the alphabet, and wherein the set of characters is different from one or more other sets of characters; a third region having a plurality of raised projections to assist in tactual perceptible identification of cell positions in the first region and the second region, wherein the plurality of raised projections include at least a number of raised projections equal to a number of positions in at least one of the first region and the second region, and wherein the plurality of raised projections indicate an ordinal position of said plurality of projections and each position in the first region and the second region corresponds to a specific raised projection; and a first raised perceptible indicium in one position in the first region and a second raised perceptible indicium in one or more positions of the second region which in combination indicate an intended character of the alphabet.