Granted Patent
Utility
US 6,578,942 · App. 10/120,303
Liquid crystal sensing of thermal ink jet head temperature
Inventors:
Richard H. Tuhro, Frederick A. Donahue
Patented Case
View Patent ↗
Granted: Jun 17, 2003
Filed: Apr 10, 2002
Inventors
Richard H. Tuhro
Frederick A. Donahue
Assignee (at issue)
Xerox Corporation
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.