Granted Patent
Utility
US 6,234,612 · App. 08/823,634
Ink jet printing apparatus having first and second print cartridges receiving energy pulses from a common drive circuit
Inventors:
Robert W. Cornell, James Harold Powers
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Mar 25, 1997
Inventors
Robert W. Cornell
James Harold Powers
Assignee (at issue)
Lexmark International, 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.