Granted Patent
Utility
US 6,770,992 · App. 09/978,257
Magnetic bearing apparatus
Inventors:
Akira Yamauchi, Masayuki Yamamoto
Patented Case
View Patent ↗
Granted: Aug 3, 2004
Filed: Oct 15, 2001
Inventors
Akira Yamauchi
Masayuki Yamamoto
Assignee (at issue)
BOC Edwards Japan Limited
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.