US Patent 7391861 Input devices and their use
Patent 7391861 was granted and assigned to Digit Wireless on June, 2008 by the United States Patent and Trademark Office.
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A keypad in which output keystrokes are determined both from individual switch activation and from the combined activation of adjacent switches. The keypad has a substrate carrying an array of sense elements arranged to change state in response to keypad operation, a flexible cover disposed above the substrate and having an exposed surface defining an array of independent key regions, with combination key regions defined in interstices between adjacent independent key regions. Snap elements provide tactile feedback. Some versions have a touch-sensitive grid rather than a switch matrix. A method of dialing a telephone includes generating a corresponding sequence of numerals by transposing alpha character input into one of the numerals 2 through 9 according to standard telephone keypad letter-number correspondence
US Patent 07391861 Input devices and their use US Patent 7391861 Input devices and their use
US Patent 07391861 Input devices and their use
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