Granted Patent
Utility
US 5,774,443 · App. 08/771,315
Optical head device capable of reducing the light power loss
Inventor:
Motomichi Shibano
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Dec 20, 1996
Inventor
Motomichi Shibano
Assignee (at issue)
Fujitsu Limited
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.