Granted Patent
Utility
US 4,852,712 · App. 07/099,152
Conveyor
Inventor:
John W. Best
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Sep 21, 1987
Inventor
John W. Best
Assignee (at issue)
Northstar Industries, 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.