Granted Patent
Utility
US 5,975,690 · App. 08/792,603
Solid ink stick supply system
Inventors:
H. Erwin Grellmann, John B. Gilbert, Robert C. Tidrick, Perry E. Wingfield
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: Jan 31, 1997
Inventors
H. Erwin Grellmann
John B. Gilbert
Robert C. Tidrick
Perry E. Wingfield
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.