Granted Patent
Utility
US 4,326,348 · App. 06/173,769
Excavating tooth assembly
Inventor:
Robert K. Emrich
Patented Case
View Patent ↗
Granted: Apr 27, 1982
Filed: Jul 30, 1980
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.