Granted Patent
Utility
US 6,418,094 · App. 09/671,427
Optical pick up device
Inventors:
Takeshi Ozawa, Masayuki Ishikawa, Toru Kamada
Patented Case
View Patent ↗
Granted: Jul 9, 2002
Filed: Sep 27, 2000
Inventors
Takeshi Ozawa
Masayuki Ishikawa
Toru Kamada
Assignee (at issue)
Kabushiki Kaisha Sankyo Seiki Seisakusho
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.