Granted Patent
Utility
US 5,789,834 · App. 08/646,221
Spindle motor
Inventors:
Yoshihisa Katoh, Fujio Nakagawa, Yasuo Sasaki
Patented Case
View Patent ↗
Granted: Aug 4, 1998
Filed: May 6, 1996
Inventors
Yoshihisa Katoh
Fujio Nakagawa
Yasuo Sasaki
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.