Granted Patent
Utility
US 6,671,249 · App. 09/942,277
OPTICAL RECORDING MEDIUM, DATA RECORDING METHOD FOR REWRITABLE-TYPE PHASE CHANGE TYPE OPTICAL DISC, DATA ERASE METHOD FOR REWRITABLE COMPACT DISC, DATA ERASE METHOD FOR REWRITABLE PHASE CHANGE TYPE RECORDING MEDIUM, READ ONLY DATA ERASE METHOD, AND RECORDING/READOUT APPARATUS
Inventor:
Michikazu Horie
Patented Case
View Patent ↗
Granted: Dec 30, 2003
Filed: Aug 27, 2001
Inventor
Michikazu Horie
Assignee (at issue)
MITSUBISHI CHEMICAL 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.