Granted Patent
Utility
US 5,644,343 · App. 08/359,775
Method and apparatus for measuring the temperature of drops ejected by an ink jet printhead
Inventor:
Ross R. Allen
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Dec 20, 1994
Inventor
Ross R. Allen
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.