Granted Patent
Utility
US 4,955,554 · App. 04/242,590
Film winder
Inventors:
William E. LeBoeuf, H. V. Wait, Jr.
Patented Case
View Patent ↗
Granted: Sep 11, 1990
Filed: Sep 12, 1988
Inventors
William E. LeBoeuf
H. V. Wait, Jr.
Assignee (at issue)
THE DOW CHEMICAL COMPANY
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.