Granted Patent
Utility
US 4,894,979 · App. 06/498,412
Sickle guard having adjustable knife section hold-down structure
Inventor:
Howard R. Lohrentz
Patented Case
View Patent ↗
Granted: Jan 23, 1990
Filed: May 26, 1983
Inventor
Howard R. Lohrentz
Assignee (at issue)
Hesston Corporation
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.