04464652 is referenced by 130 patents and cites 10 patents.

A cursor control device having particular application to a computer display system is disclosed. The cursor control includes a unitary frame, having a domed portion substantially surrounding and retaining a ball which is free to rotate. X-Y position indicating means are provided, such that rotation of the ball provides signals indicative of X-Y positions on the display system. The ball is free to "float" in the vertical direction within the dome, and thereby maintain good surface contact. X-Y positions are established by movement of the control device over a surface. A display system and method is disclosed for use in conjunction with the cursor control device, which permits a user to select command options simply by movement of the displayed cursor over a "pull-down" menu bar.

Title
Cursor control device for use with display systems
Application Number
6/399704
Publication Number
4464652
Application Date
July 19, 1982
Publication Date
August 7, 1984
Inventor
William D Atkinson
Los Gatos
CA, US
William F Lapson
Cupertino
CA, US
Agent
Blakely Sokoloff Taylor & Zafman
Assignee
Apple Computer
CA, US
IPC
G09G 1/00
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