Granted Patent
Utility
US 6,439,973 · App. 09/903,597
Polishing device, end face polishing apparatus having polishing device, and end face polishing method
Inventors:
Mari Kato, Kouji Minami, Masaharu Sugiyama
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Jul 12, 2001
Inventors
Mari Kato
Kouji Minami
Masaharu Sugiyama
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.