Granted Patent
Utility
US 6,032,390 · App. 08/486,116
Tooth assembly for excavation bucket
Inventor:
Robert S. Bierwith
Patented Case
View Patent ↗
Granted: Mar 7, 2000
Filed: Jun 7, 1995
Inventor
Robert S. Bierwith
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.