Granted Patent
Utility
US 6,519,411 · App. 09/690,999
Digital signal recording and reproduction apparatus suitable for recording and reproducing a compressed video signal
Inventors:
Naozumi Sugimura, Hiroo Okamoto
Patented Case
View Patent ↗
Granted: Feb 11, 2003
Filed: Oct 18, 2000
Inventors
Naozumi Sugimura
Hiroo Okamoto
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.