05231578 is referenced by 90 patents and cites 15 patents.

A data processing system provides annotation of a document through an electronic tablet, a keyboard and an audio assembly. An annotatable document is generated from a window of a multiwindow support program running independently of the annotation program in the data processing system. For each window of the multiwindow program, a working document is generated and is annotatable by the annotation program and apparatus. An annotatable document is also generated from the whole screen view of overlapping windows produced during execution of the multiwindow support program. Annotated working documents may be subsequently stored in and thereafter retrieved from the database of the multiwindow support program.

Title
Apparatus for document annotation and manipulation using images from a window source
Application Number
360656
Publication Number
5231578
Application Date
November 13, 1990
Publication Date
July 27, 1993
Inventor
Ronald F Rudis
North Andover
MA, US
David R Lakness
Westford
MA, US
Alex J Harui
Derry
NH, US
Raymond S Burns
North Andover
MA, US
Kenneth H Abrams
Sudbury
MA, US
Stephen R Levin
North Andover
MA, US
Agent
Kenneth L Milik
Assignee
Wang Laboratories
MA, US
IPC
G06F 15/74
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