Granted Patent
Utility
US 4,587,714 · App. 06/567,728
Manufacture of motor with split back magnet array
Inventor:
Frank Morris
Patented Case
View Patent ↗
Granted: May 13, 1986
Filed: Jan 3, 1984
Inventor
Frank Morris
Assignee (at issue)
Memorex Corporation
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.