Laura L Harvey

US Patent:

6956560, Oct 18, 2005

Filed:

Aug 24, 2001

Appl. No.:

09/938772

Inventors:

Malgorzata A. Brothers - Plano TX, US
J. Douglas Child - Maitland FL, US
Laura K. Harvey - Allen TX, US

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G09G005/00

US Classification:

345169, 708142

Abstract:

A graphing calculator () having a user interface that allows the user to easily select mathematical objects from the history screen and incorporate those objects as inputs. The user interface preferably includes a sub-expression selection mode that allows the user to manipulate a selection box over the desired mathematical object.

US Patent:

20030122776, Jul 3, 2003

Filed:

Dec 28, 2001

Appl. No.:

10/035099

Inventors:

Todd Fortenberry - McKinney TX, US
Laura Harvey - Allen TX, US

International Classification:

G09G005/00

US Classification:

345/156000

Abstract:

An algorithm and handheld device adapted to select a subexpression of a mathematical expression. An expression string of the handheld device is selected, and the expression string is converted to a contiguous tokenized Polish representation (CTPR) of the expression, and the CTPR of the expression is loaded into an n-ary tree. The user may navigate the visual representation of the expression to select a subexpression. The handheld device is adapted to select the subexpression from the n-ary tree.