Granted Patent
Utility
US 5,693,138 · App. 08/516,340
Magnetooptical element
Inventor:
Koichi Onodera
Patented Case
View Patent ↗
Granted: Dec 2, 1997
Filed: Aug 17, 1995
Inventor
Koichi Onodera
Assignee (at issue)
TOKIN CORPORATION
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.