Granted Patent
Utility
US 4,947,550 · App. 07/326,878
Guidebar with oil channels
Inventor:
Gerhard Wenzel
Patented Case
View Patent ↗
Granted: Aug 14, 1990
Filed: Mar 21, 1989
Inventor
Gerhard Wenzel
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.