Granted Patent
Utility
US 6,206,558 · App. 09/049,038
Extrusion system
Inventor:
Robert W. Beckwith
Patented Case
View Patent ↗
Granted: Mar 27, 2001
Filed: Mar 27, 1998
Inventor
Robert W. Beckwith
Assignee (at issue)
SENCORP SYSTEMS, 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.