Granted Patent
Utility
US 4,608,791 · App. 06/762,319
Slope build-up system for roofs
Inventor:
Richard R. McClure
Patented Case
View Patent ↗
Granted: Sep 2, 1986
Filed: Aug 5, 1985
Inventor
Richard R. McClure
Assignee (at issue)
BUTLER MANUFACTURING COMPANY
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.