Granted Patent
Utility
US 6,633,530 · App. 09/651,743
Optical pickup apparatus with light source unit including first light source and common light receiving section
Inventor:
Tadashi Takeda
Patented Case
View Patent ↗
Granted: Oct 14, 2003
Filed: Aug 30, 2000
Inventor
Tadashi Takeda
Assignee (at issue)
Sankyo Seiki Mfg. 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.