Granted Patent
Utility
US 5,881,071 · App. 08/812,286
Digital write-and-read method and signal processing apparatus
Inventors:
Alexander Kuznetsov, Masuo Umemoto, Naoya Kobayashi, Hideki Sawaguchi
Patented Case
View Patent ↗
Granted: Mar 9, 1999
Filed: Mar 6, 1997
Inventors
Alexander Kuznetsov
Masuo Umemoto
Naoya Kobayashi
Hideki Sawaguchi
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.