Granted Patent
Utility
US 6,226,257 · App. 09/409,945
Optical information storage medium having lands and grooves both serving as recording tracks
Inventor:
Yasuaki Morimoto
Patented Case
View Patent ↗
Granted: May 1, 2001
Filed: Sep 30, 1999
Inventor
Yasuaki Morimoto
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.