Granted Patent
Utility
US 4,294,044 · App. 06/155,284
Tracking mechanism for a belt type sander
Inventor:
John M. Hansen
Patented Case
View Patent ↗
Granted: Oct 13, 1981
Filed: Jun 2, 1980
Inventor
John M. Hansen
Assignee (at issue)
Emerson Electric 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.