Granted Patent
Utility
US 4,463,925 · App. 06/393,613
Concrete form structure including one-way escape hinge
Inventor:
Vernon R. Schimmel
Patented Case
View Patent ↗
Granted: Aug 7, 1984
Filed: Jul 2, 1982
Inventor
Vernon R. Schimmel
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.