Granted Patent
Utility
US 5,798,993 · App. 08/651,301
System and method for simultaneously verifying optical data writing and optical data writing medium for use therein
Inventors:
Shuichi Ohkubo, Mitsuya Okada, Masaki Itou
Patented Case
View Patent ↗
Granted: Aug 25, 1998
Filed: May 22, 1996
Inventors
Shuichi Ohkubo
Mitsuya Okada
Masaki Itou
Assignee (at issue)
NEC 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.