Granted Patent
Utility
US 6,639,892 · App. 09/870,653
Optical data recording medium excellent in recording sensitivity and recording property
Inventor:
Yoshihisa Usami
Patented Case
View Patent ↗
Granted: Oct 28, 2003
Filed: Jun 1, 2001
Inventor
Yoshihisa Usami
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.