Granted Patent
Utility
US 5,247,771 · App. 07/856,124
Ridge shingle unit
Inventor:
James E. Poplin
Patented Case
View Patent ↗
Granted: Sep 28, 1993
Filed: Mar 23, 1992
Inventor
James E. Poplin
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.