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US 7,403,189 B2Granted
Graphical calculator
AssigneeHewlett-Packard Development Company, L.P.
InventorCyrille de Brébisson
Life of this patent
Estimating the term…
Abstract
A hand-held graphical calculator having a display and an input area is described. The input area includes a maximum of 30 keys and an input device. A hand-held graphical calculator package includes a hand-held graphical calculator for graphically displaying a user-entered expression and a user manual is described. The user manual is a single sheet of instructions describing operation of the graphical calculator.
Claims17
A hand-held calculator comprising:
- a calculator having a display, wherein the display is adapted to display graphs;
- and
- an input area connected to the calculator wherein the input area comprises a plurality of keys and a directional input device, wherein each key of the plurality of keys is arranged to generate a maximum of two functions.
A hand-held graphical calculator package, the package comprising:
- a hand-held graphical calculator for displaying a graph of an expression;
- and
- a user manual comprising a single sheet of instructions including operating instructions for the graphical calculator.
Dependencies are inferred from the claim text.