Granted Patent
Utility
US 6,604,860 · App. 09/922,238
Thrust bearing device and motor
Inventor:
Kengo Yamamura
Patented Case
View Patent ↗
Granted: Aug 12, 2003
Filed: Aug 3, 2001
Inventor
Kengo Yamamura
Assignee (at issue)
ASMO CO., LTD.
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.