Granted Patent
Utility
US 5,155,813 · App. 07/753,014
Computer apparatus for brush styled writing
Inventors:
Karen Donoghue, Kenneth C. Knowlton
Patented Case
View Patent ↗
Granted: Oct 13, 1992
Filed: Aug 23, 1991
Inventors
Karen Donoghue
Kenneth C. Knowlton
Assignee (at issue)
Wang Laboratories, Inc.
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.