Granted Patent
Utility
US 6,552,858 · App. 09/997,037
Objective lens system and optical disk apparatus using the same
Inventors:
Kazushi Uno, Tsuyoshi Matsumoto
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Nov 29, 2001
Inventors
Kazushi Uno
Tsuyoshi Matsumoto
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.