Granted Patent
Utility
US 6,244,697 · App. 09/343,918
Filter tower for ink jet printhead
Inventors:
James Harold Powers, Matthew Russell
Patented Case
View Patent ↗
Granted: Jun 12, 2001
Filed: Jun 30, 1999
Inventors
James Harold Powers
Matthew Russell
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.