Granted Patent
Utility
US 6,213,587 · App. 09/356,573
Ink jet printhead having improved reliability
Inventor:
Charles S. Whitman
Patented Case
View Patent ↗
Granted: Apr 10, 2001
Filed: Jul 19, 1999
Inventor
Charles S. Whitman
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.