Granted Patent
Utility
US 6,440,229 · App. 09/620,420
Lower pre-heat block for use in metal scarfing apparatus
Inventor:
Stephen August Engel
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Jul 20, 2000
Inventor
Stephen August Engel
Assignee (at issue)
THE ESAB GROUP 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.