Granted Patent
Utility
US 5,786,916 · App. 08/663,875
Optical-wavelength interchanger element and optical-wavelength interchanger device
Inventors:
Hideaki Okayama, Chang Xu
Patented Case
View Patent ↗
Granted: Jul 28, 1998
Filed: Jun 19, 1996
Inventors
Hideaki Okayama
Chang Xu
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.