Granted Patent
Utility
US 4,423,116 · App. 06/358,165
Reusable projection transparency
Inventor:
Richard Fox
Patented Case
View Patent ↗
Granted: Dec 27, 1983
Filed: Mar 15, 1982
Inventor
Richard Fox
Assignee (at issue)
Appleton Papers 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.