Granted Patent
Utility
US 6,177,948 · App. 09/046,164
PQE for font vs. large dark patch
Inventors:
Dennis C. Estabrooks, Jack Louis Zable
Patented Case
View Patent ↗
Granted: Jan 23, 2001
Filed: Mar 23, 1998
Inventors
Dennis C. Estabrooks
Jack Louis Zable
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.