Granted Patent
Utility
US 6,507,009 · App. 09/347,530
Optical detector, signal processing circuit and optical information reproduction apparatus thereof
Inventors:
Kunikazu Ohnishi, Takeshi Shimano, Shigeru Nakamura, Masayuki Inoue, Yukio Fukui, Yasuyuki Sugi, Shinji Fujita, Mitsuhiko Ota
Patented Case
View Patent ↗
Granted: Jan 14, 2003
Filed: Jul 6, 1999
Inventors
Kunikazu Ohnishi
Takeshi Shimano
Shigeru Nakamura
Masayuki Inoue
Yukio Fukui
Yasuyuki Sugi
Shinji Fujita
Mitsuhiko Ota
Assignees (at issue)
HITACHI, LTD.
HITACHI MEDIA ELECTRONICS CO., 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.