Granted Patent
Utility
US 4,915,345 · App. 07/135,024
Concrete forming system for curved walls
Inventor:
Larry W. Lehmann
Patented Case
View Patent ↗
Granted: Apr 10, 1990
Filed: Dec 18, 1987
Inventor
Larry W. Lehmann
Assignee (at issue)
Symons 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.