Granted Patent
Utility
US 4,454,084 · App. 06/386,735
Extrusion die control system
Inventors:
David J. Smith, R. Ted Scharenberg, William W. Beck
Patented Case
View Patent ↗
Granted: Jun 12, 1984
Filed: Jun 9, 1982
Inventors
David J. Smith
R. Ted Scharenberg
William W. Beck
Assignee (at issue)
Leesona 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.