Granted Patent
Utility
US 4,863,366 · App. 07/203,834
Feed unit for an extruder
Inventor:
Heung T. Kim
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Jun 8, 1988
Inventor
Heung T. Kim
Assignee (at issue)
B. F. Goodrich Company
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.