Granted Patent
Utility
US 5,820,815 · App. 08/783,561
Cooled tapping device
Inventor:
David B. George
Patented Case
View Patent ↗
Granted: Oct 13, 1998
Filed: Jan 15, 1997
Inventor
David B. George
Assignee (at issue)
Kennecott Holdings Company
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.