04972496 is referenced by 227 patents and cites 18 patents.

A keyboardless entry computer system includes a transparent input screen that generates positional information when contacted by a stylus, and a display screen mounted physically below the input screen such that a character that is displayed can be seen below the input screen. The system includes a computer that has been programmed to compile the positional information into Strokes, to calculate Stroke characteristics, and then compare the Stroke characteristics with those stored in a database in order to recognize the symbol drawn by the stylus. Key features of the system are: (1) transparent position sensing subsystem; (2) underlying display on which to mimic drawing of sensed positions and to show characters or symbols; (3) means to convert sensed positions first into plotted Points and then into recognized characters or symbols; and (4) means to "learn" to associate sensed input positions with a character or symbol.

Title
Handwritten keyboardless entry computer system
Application Number
889513
Publication Number
4972496
Application Date
March 24, 1987
Publication Date
November 20, 1990
Inventor
Ralph Sklarew
Reston
VA, US
Agent
Townsend & Townsend
Assignee
Grid Systems Corporation
CA, US
IPC
G06K 9/22
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