Granted Patent
Utility
US 5,974,021 · App. 08/870,405
Determination of optimal recording power in optical disk recording and retrieving device
Inventors:
Tsuyoshi Toda, Shigeki Yamazaki, Toshimitsu Kaku
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: Jun 6, 1997
Inventors
Tsuyoshi Toda
Shigeki Yamazaki
Toshimitsu Kaku
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.