Granted Patent
Utility
US 6,201,654 · App. 09/468,822
Method and apparatus for recording digital signal
Inventors:
Hiroo Okamoto, Hitoaki Owashi, Takaharu Noguchi, Kyoichi Hosokawa
Patented Case
View Patent ↗
Granted: Mar 13, 2001
Filed: Dec 22, 1999
Inventors
Hiroo Okamoto
Hitoaki Owashi
Takaharu Noguchi
Kyoichi Hosokawa
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.