Granted Patent
Utility
US 4,285,686 · App. 06/082,091
V-Board folder for flexible plastic films
Inventor:
James R. Ambler
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Oct 5, 1979
Inventor
James R. Ambler
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.