Granted Patent
Utility
US 6,778,486 · App. 09/498,818
Laser module, optical head and optical information recording and reproducing apparatus
Inventors:
Kouji Arikawa, Susumu Tachibana, Kazuo Shigematsu, Hideo Taguchi, Shigeru Nakamura, Tetsuya Tomobe
Patented Case
View Patent ↗
Granted: Aug 17, 2004
Filed: Feb 4, 2000
Inventors
Kouji Arikawa
Susumu Tachibana
Kazuo Shigematsu
Hideo Taguchi
Shigeru Nakamura
Tetsuya Tomobe
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.