Granted Patent
Utility
US 4,669,945 · App. 06/844,369
Foldable and swivelable hopper-loading screw conveyor
Inventors:
Lorne R. Pollard, Donald K. Tashiro
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Mar 26, 1986
Inventors
Lorne R. Pollard
Donald K. Tashiro
Assignee (at issue)
J. I. Case Company
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.