Granted Patent
Utility
US 6,471,570 · App. 09/546,771
End surface polishing machine
Inventors:
Kouji Minami, Kizaburo Yoshida
Patented Case
View Patent ↗
Granted: Oct 29, 2002
Filed: Apr 11, 2000
Inventors
Kouji Minami
Kizaburo Yoshida
Assignee (at issue)
SEIKO INSTRUMENTS INC.
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.