Granted Patent
Utility
US 4,948,281 · App. 07/416,815
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Inventor:
Arend Werner
Patented Case
View Patent ↗
Granted: Aug 14, 1990
Filed: Oct 4, 1989
Inventor
Arend Werner
Assignee (at issue)
International Business Machines Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.