Granted Patent
Utility
US 6,328,156 · App. 09/455,387
Conveyor belt side curtains
Inventor:
Arthur C. Ostman
Patented Case
View Patent ↗
Granted: Dec 11, 2001
Filed: Dec 6, 1999
Inventor
Arthur C. Ostman
Assignees (at issue)
Arthur C. Ostman
Nelson Williams Linings, 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.