Granted Patent
Utility
US 4,320,612 · App. 06/178,249
End block
Inventor:
Ernest H. Jeffries, Jr.
Patented Case
View Patent ↗
Granted: Mar 23, 1982
Filed: Aug 15, 1980
Inventor
Ernest H. Jeffries, Jr.
Assignee (at issue)
RESCO PRODUCTS, 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.