Granted Patent
Utility
US 5,452,970 · App. 08/175,346
Drill bit
Inventor:
Erik Sundstrom
Patented Case
View Patent ↗
Granted: Sep 26, 1995
Filed: Apr 13, 1994
Inventor
Erik Sundstrom
Assignee (at issue)
SANDVIK AB
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.