05920694 is referenced by 226 patents and cites 13 patents.

A system in which multiple computers engage in a collaborative video conference. One computer generates a common image which is distributed to the other computers. The invention allows the users of the other computers to annotate (that is, mark up, by drawings and text) the image at their respective computers. The invention replicates the annotations at the other computers.

One type of annotation allowed is "highlighting," wherein a user drags a cursor across a display, and the invention leaves a colored trail behind the cursor, which is transparent, and does not obscure the underlying images.

Title
Annotation of computer video displays
Application Number
35092
Publication Number
5920694
Application Date
April 7, 1997
Publication Date
July 6, 1999
Inventor
Krista S Schwartz
Batavia
IL, US
David R Connet
Batavia
IL, US
Allison A Carleton
Lisle
IL, US
Agent
George H Gates
Gregory A Welte
Assignee
NCR Corporation
OH, US
IPC
G06F 15/17
G06F 13/38
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