Granted Patent
Utility
US 6,016,300 · App. 09/114,602
Optical pickup head apparatus
Inventors:
Tadashi Takeda, Yoshio Hayashi, Hideo Takezoe, Ken Ishikawa
Patented Case
View Patent ↗
Granted: Jan 18, 2000
Filed: Jul 13, 1998
Inventors
Tadashi Takeda
Yoshio Hayashi
Hideo Takezoe
Ken Ishikawa
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.