Granted Patent
Utility
US 4,357,561 · App. 06/301,394
Automotive rim roll forming drive system
Inventor:
Vernon R. Fencl
Patented Case
View Patent ↗
Granted: Nov 2, 1982
Filed: Sep 11, 1981
Inventor
Vernon R. Fencl
Assignee (at issue)
Grotnes Metalforming Systems, 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.