Granted Patent
Utility
US 4,402,656 · App. 06/250,617
Control of tubular film size
Inventor:
Charles M. Schott, Jr.
Patented Case
View Patent ↗
Granted: Sep 6, 1983
Filed: Apr 3, 1981
Inventor
Charles M. Schott, Jr.
Assignee (at issue)
Gloucester Engineering Co., 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.