Granted Patent
Utility
US 5,363,619 · App. 07/984,982
Positive locking concrete screed rail
Inventor:
Mike McPhee
Patented Case
View Patent ↗
Granted: Nov 15, 1994
Filed: Dec 2, 1992
Inventor
Mike McPhee
Assignee (at issue)
Permaban North America, 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.