Granted Patent
Utility
US 6,722,945 · App. 10/261,636
Endface polishing method and endface polishing apparatus
Inventors:
Kazumasa Katakura, Kouji Minami
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Sep 30, 2002
Inventors
Kazumasa Katakura
Kouji Minami
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.