Granted Patent
Utility
US 5,628,047 · App. 08/209,637
Method of manufacturing a radially oriented magnet
Inventor:
Hidetoshi Hiroyoshi
Patented Case
View Patent ↗
Granted: May 6, 1997
Filed: Mar 10, 1994
Inventor
Hidetoshi Hiroyoshi
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.