Granted Patent
Utility
US 6,580,558 · App. 09/844,547
Optical isolator
Inventors:
Rong Zhu, Youfu Shao
Patented Case
View Patent ↗
Granted: Jun 17, 2003
Filed: Apr 27, 2001
Inventors
Rong Zhu
Youfu Shao
Assignee (at issue)
Hon Hai Precision Ind. 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.