Granted Patent
Utility
US 4,958,721 · App. 07/211,360
Inclined bucket elevator
Inventor:
Chris R. Redford
Patented Case
View Patent ↗
Granted: Sep 25, 1990
Filed: Jun 24, 1988
Inventor
Chris R. Redford
Assignee (at issue)
The Upjohn Co.
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.