Granted Patent
Utility
US 5,924,945 · App. 08/759,158
Sprocket with indentations forming hydrodynamic bearings
Inventor:
Harvey Stan Ball
Patented Case
View Patent ↗
Granted: Jul 20, 1999
Filed: Dec 3, 1996
Inventor
Harvey Stan Ball
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.