Granted Patent
Utility
US 6,477,129 · App. 09/794,913
Optical disc drive
Inventors:
Koichi Maruyama, Takeshi Shimano, Shigeru Nakamura, Akira Arimoto, Kazuo Shigematsu
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Feb 28, 2001
Inventors
Koichi Maruyama
Takeshi Shimano
Shigeru Nakamura
Akira Arimoto
Kazuo Shigematsu
Assignees (at issue)
HITACHI, LTD.
Asahi Kogaku Kogyo Kabushiki Kaisha
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.