Granted Patent
Utility
US 6,744,709 · App. 09/798,799
Focusing control apparatus, recording medium, and optical disk playback apparatus
Inventor:
Toshikazu Kobayashi
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Mar 2, 2001
Inventor
Toshikazu Kobayashi
Assignee (at issue)
SONY COMPUTER ENTERTAINMENT INC.
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.