Granted Patent
Utility
US 4,375,492 · App. 06/266,565
Dielectric record material
Inventor:
Richard Fox
Patented Case
View Patent ↗
Granted: Mar 1, 1983
Filed: May 22, 1981
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.