Granted Patent
Utility
US 5,808,999 · App. 08/848,195
Optical pickup apparatus and objective lens for optical pickup apparatus
Inventor:
Katsuya Yagi
Patented Case
View Patent ↗
Granted: Sep 15, 1998
Filed: Apr 29, 1997
Inventor
Katsuya Yagi
Assignee (at issue)
Konica 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.