Granted Patent
Utility
US 4,688,965 · App. 06/866,907
Extendable screed and method for paving non-coplanar road surface
Inventors:
Donald O. Smith, George Goehst
Patented Case
View Patent ↗
Granted: Aug 25, 1987
Filed: May 27, 1986
Inventors
Donald O. Smith
George Goehst
Assignee (at issue)
Barber-Greene 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.