Granted Patent
Utility
US 4,992,828 · App. 07/448,398
Digitizer having selected area designation
Inventor:
Christopher B. Liston
Patented Case
View Patent ↗
Granted: Feb 12, 1991
Filed: Dec 11, 1989
Inventor
Christopher B. Liston
Assignee (at issue)
EASTMAN KODAK COMPANY
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.