Granted Patent
Utility
US 5,888,555 · App. 08/844,796
Extrusion die
Inventor:
Hobab El-Sobky
Patented Case
View Patent ↗
Granted: Mar 30, 1999
Filed: Apr 22, 1997
Inventor
Hobab El-Sobky
Assignee (at issue)
University of Manchester Institute of Science and Technology
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.