Granted Patent
Utility
US 5,239,381 · App. 07/578,331
Apparatus for recording and reproducing a plurality of television signals of different systems
Inventor:
Hiroaki Takahashi
Patented Case
View Patent ↗
Granted: Aug 24, 1993
Filed: Sep 6, 1990
Inventor
Hiroaki Takahashi
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.