Granted Patent
Utility
US 5,243,421 · App. 07/772,162
Signal processor for a wide televison receiver
Inventors:
Tatsuo Nagata, Shigeru Hirahata, Kenji Katsumata, Shinobu Torikoshi, Mitsuo Konno
Patented Case
View Patent ↗
Granted: Sep 7, 1993
Filed: Oct 7, 1991
Inventors
Tatsuo Nagata
Shigeru Hirahata
Kenji Katsumata
Shinobu Torikoshi
Mitsuo Konno
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.