Granted Patent
Utility
US 5,223,860 · App. 07/716,567
Apparatus for supplying phase change ink to an ink jet printer
Inventors:
Donald I. Loofbourow, Richard G. Chambers
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Jun 17, 1991
Inventors
Donald I. Loofbourow
Richard G. Chambers
Assignee (at issue)
Tektronix, 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.