Granted Patent
Utility
US 4,267,017 · App. 06/110,597
Drainage roof for twin wire roll former
Inventor:
Merle W. North
Patented Case
View Patent ↗
Granted: May 12, 1981
Filed: Jan 9, 1980
Inventor
Merle W. North
Assignee (at issue)
Beloit Corporation
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.