Granted Patent
Utility
US 6,170,893 · App. 09/371,521
Implement with reinforcing rib or corrugation
Inventor:
Thomas W. Parker
Patented Case
View Patent ↗
Granted: Jan 9, 2001
Filed: Aug 10, 1999
Inventor
Thomas W. Parker
Assignee (at issue)
UnionTools, Inc.
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.