Granted Patent
Utility
US 6,498,691 · App. 09/809,047
Digital transmission signal processing system and recording/reproducing system
Inventors:
Hideo Arai, Hitoaki Owashi, Kyoichi Hosokawa, Keizo Nishimura, Yoshizumi Watatani, Akira Shibata
Patented Case
View Patent ↗
Granted: Dec 24, 2002
Filed: Mar 16, 2001
Inventors
Hideo Arai
Hitoaki Owashi
Kyoichi Hosokawa
Keizo Nishimura
Yoshizumi Watatani
Akira Shibata
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.