Granted Patent
Utility
US 5,870,356 · App. 08/884,513
Optical storage apparatus which detects a lens position signal without a lens position sensor
Inventor:
Toru Ikeda
Patented Case
View Patent ↗
Granted: Feb 9, 1999
Filed: Jun 27, 1997
Inventor
Toru Ikeda
Assignee (at issue)
Fujitsu Limited
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.