07075520 is referenced by 123 patents and cites 40 patents.

Multidirectional keys of a reduced keypad are used to disambiguate between multiple symbols associated with a single key. For example, pressing a key identifies a collection of two or more symbols associated with the key and subsequently rocking the key selects one of the two or more symbols as unambiguously identified by the user.

Title
Key press disambiguation using a keypad of multidirectional keys
Application Number
10/20572
Publication Number
7075520 (B2)
Application Date
December 12, 2001
Publication Date
July 11, 2006
Inventor
Roland E Williams
Pleasant Hill
CA, US
Agent
Ivey Smith and Ramirez
James D Ivey
Assignee
Zi Technology Corporation
BM
IPC
G09G 5/00
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