Granted Patent
Utility
US 4,986,413 · App. 07/436,202
Conveyor belt inversion device
Inventor:
Dennis Mraz
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Nov 14, 1989
Inventor
Dennis Mraz
Assignee (at issue)
DM Enterprises, 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.