Granted Patent
Utility
US 6,773,945 · App. 10/212,170
Method of manufacturing a waveguide optical semiconductor device
Inventor:
Koji Yamada
Patented Case
View Patent ↗
Granted: Aug 10, 2004
Filed: Aug 6, 2002
Inventor
Koji Yamada
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.