Granted Patent
Utility
US 4,940,133 · App. 07/224,696
Conveyor belt and system with a non-collapsing inside edge
Inventors:
Gerald C. Roinestad, Michael R. Straight
Patented Case
View Patent ↗
Granted: Jul 10, 1990
Filed: Jul 27, 1988
Inventors
Gerald C. Roinestad
Michael R. Straight
Assignee (at issue)
Ashworth Bros., 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.