Granted Patent
Utility
US 6,120,188 · App. 09/094,560
Bearing unit manufacturing method bearing unit and motor using the bearing unit
Inventors:
Hiroyasu Fujinaka, Shigeru Otsuka
Patented Case
View Patent ↗
Granted: Sep 19, 2000
Filed: Jun 15, 1998
Inventors
Hiroyasu Fujinaka
Shigeru Otsuka
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.