Granted Patent
Utility
US 5,664,451 · App. 08/510,150
Roll forming machine for an indeterminate length metal roof panel
Inventor:
Robert E. Schultz
Patented Case
View Patent ↗
Granted: Sep 9, 1997
Filed: Aug 2, 1995
Inventor
Robert E. Schultz
Assignee (at issue)
Englert/Rollformer, 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.