Granted Patent
Utility
US 4,547,246 · App. 06/562,888
Extrusion method
Inventors:
Montri Viriyayuthakorn, Robert V. DeBoo
Patented Case
View Patent ↗
Granted: Oct 15, 1985
Filed: Dec 19, 1983
Inventors
Montri Viriyayuthakorn
Robert V. DeBoo
Assignee (at issue)
AT&T Technologies Incorporated
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.