Granted Patent
Utility
US 6,577,462 · App. 09/445,217
Method and device for recording and reproducing data
Inventors:
Jin Hamada, Katsuhiro Tsuneta, Terumi Takashi, Tsuneo Hirose
Patented Case
View Patent ↗
Granted: Jun 10, 2003
Filed: Dec 6, 1999
Inventors
Jin Hamada
Katsuhiro Tsuneta
Terumi Takashi
Tsuneo Hirose
Assignee (at issue)
HITACHI, LTD.
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.