05036315 is referenced by 60 patents and cites 7 patents.

A first computer workstation running windowed display system and applications programs produces a first video signal of a composite, windowed, display plus a first data signal indicating the dedications, positions, and sizes of all windows. A second computer asynchronously digitally communicates a second display signal to a communications controller and then to a display controller. The display controller also receives the first data signal plus the sync pulse of the first video signal. It produces, from the second display signal, a second video display signal that (i) is synchronized with the first video signal and (ii) contains display information positioned and scaled to be within a window dedicated to the second computer. It produces a switch control signal indicating the portions of each raster scan of the synchronized video signals that are inside and outside the dedicated window. The switch control signal gates in a video switch either the first or the second video signal to a video monitor. The video monitor displays windows showing information from the first computer plus a dedicated window showing information from the second computer.

Title
Simultaneous display of interleaved windowed video information from multiple asynchronous computers on a single video monitor
Application Number
7/241031
Publication Number
5036315
Application Date
September 6, 1988
Publication Date
July 30, 1991
Inventor
James Gurley
San Diego
CA, US
Agent
William C Fuess
Assignee
Spectragraphics
CA, US
IPC
G09G 5/14
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