Granted Patent
Utility
US 4,642,040 · App. 06/768,574
Extruder drivingly connected to gear pump
Inventor:
Steve Fox
Patented Case
View Patent ↗
Granted: Feb 10, 1987
Filed: Aug 23, 1985
Inventor
Steve Fox
Assignee (at issue)
Normag 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.