Granted Patent
Utility
US 5,220,227 · App. 07/738,907
Rotor magnet of motor and having improved magnetizing pattern and method of magnetizing the same
Inventor:
Shinichi Ohi
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Aug 1, 1991
Inventor
Shinichi Ohi
Assignee (at issue)
Zexel GmbH
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.