Granted Patent
Utility
US 6,229,943 · App. 09/034,288
Optical circuit device and wavelength router
Inventor:
Hideaki Okayama
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Mar 4, 1998
Inventor
Hideaki Okayama
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.