Granted Patent
Utility
US 4,639,738 · App. 06/722,549
Ink level detection system for ink jet printing apparatus
Inventors:
Lawrence R. Young, Gregory J. Sexton, Randal L. Mullins, Brian D. Bradley
Patented Case
View Patent ↗
Granted: Jan 27, 1987
Filed: Apr 12, 1985
Inventors
Lawrence R. Young
Gregory J. Sexton
Randal L. Mullins
Brian D. Bradley
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.