Granted Patent
Utility
US 6,320,837 · App. 09/420,131
Optical pickup and optical device
Inventor:
Minoru Ohyama
Patented Case
View Patent ↗
Granted: Nov 20, 2001
Filed: Oct 18, 1999
Inventor
Minoru Ohyama
Assignee (at issue)
Victor Company of Japan, Ltd.
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.