Granted Patent
Utility
US 4,761,900 · App. 06/937,982
Excavating tooth assembly
Inventor:
Robert K. Emrich
Patented Case
View Patent ↗
Granted: Aug 9, 1988
Filed: Dec 4, 1986
Inventor
Robert K. Emrich
Assignee (at issue)
ESCO GROUP LLC
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.