05258748 is referenced by 135 patents and cites 6 patents.

A calculating device and related method for accessing and selecting among multiple key functions with a minimum of keystrokes. The keyboard includes menu keys corresponding to menu labels displayable on the display and a multi-function key having a primary function and a secondary function. Which of the key functions is selected depends on the duration of the key press. The calculating device executes the primary function if the key is pressed for a short time. However, if the key is pressed for longer than a given time period, the calculating device displays a set of menu labels and assigns a function associated with a displayed menu label to a menu key. If the key continues to be pressed, the display scrolls to show additional sets of menu labels. A menu function may then be selected by releasing the multi-function key and pressing the appropriate menu key.

Title
Accessing and selecting multiple key functions with minimum keystrokes
Application Number
7/751368
Publication Number
5258748
Application Date
August 28, 1991
Publication Date
November 2, 1993
Inventor
Robert W Jones
Corvallis
OR, US
Assignee
Hewlett Packard Company
CA, US
IPC
G09G 3/02
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