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On a cursory glance, that patent seems to be talking about nothing more than representing prefix codes, and displaying/articulating them, and displaying valid options to finish a prefix code.
Prefix codes are used since the middle of the previous century.
Displaying valid options are also used in the T9 predictive text input technology which may be considered a prior art, as it was patented with filing date 1995 whereas the patent which was linked in was filed in 1997.
Of course that is just from the frying pan into the fire.
I have to note though, that I am not a lawyer, and that was just a cursory glance at the situation.
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