Granted Patent
Utility
US 5,167,320 · App. 07/664,588
Variable speed drive for screw conveyor
Inventors:
Todd C. Lucich, Edward F. Krome, Jr., Michael G. Howe, Larry D. Fields
Patented Case
View Patent ↗
Granted: Dec 1, 1992
Filed: Mar 4, 1991
Inventors
Todd C. Lucich
Edward F. Krome, Jr.
Michael G. Howe
Larry D. Fields
Assignee (at issue)
Reliance Electric Industrial 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.