Granted Patent
Utility
US 6,563,244 · App. 09/626,432
Composite-type electromagnet and radial magnetic bearing
Inventors:
Akira Yamauchi, Okikazu Kuwahara
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Jul 27, 2000
Inventors
Akira Yamauchi
Okikazu Kuwahara
Assignee (at issue)
SEIKO INSTRUMENTS INC.
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.