Granted Patent
Utility
US 6,184,512 · App. 09/082,385
Semiconductor laser apparatus and optical pickup apparatus
Inventors:
Kazuo Higashiura, Yoshio Hayashi, Tadashi Takeda
Patented Case
View Patent ↗
Granted: Feb 6, 2001
Filed: May 20, 1998
Inventors
Kazuo Higashiura
Yoshio Hayashi
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.