Granted Patent
Utility
US 6,236,500 · App. 09/338,794
Optical amplifier
Inventors:
Mikiya Suzuki, Toshio Nakamura, Akira Sasaki, Shigeru Shikii
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Jun 23, 1999
Inventors
Mikiya Suzuki
Toshio Nakamura
Akira Sasaki
Shigeru Shikii
Assignee (at issue)
OKI ELECTRIC INDUSTRY 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.