Granted Patent
Utility
US 6,449,231 · App. 09/232,927
Storage unit, optical recording medium and information recording method
Inventor:
Takehiko Numata
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Jan 19, 1999
Inventor
Takehiko Numata
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.