Granted Patent
Utility
US 5,289,069 · App. 07/748,937
Brushless motor
Inventors:
Makoto Hasegawa, Kenji Kubo, Naoto Noguchi, Toshio Imai
Patented Case
View Patent ↗
Granted: Feb 22, 1994
Filed: Aug 23, 1991
Inventors
Makoto Hasegawa
Kenji Kubo
Naoto Noguchi
Toshio Imai
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, LTD.
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.