Granted Patent
Utility
US 6,791,675 · App. 09/995,616
Optical waveguide path, manufacturing method and coupling method of the same, and optical waveguide path coupling structure
Inventors:
Hideo Kikuchi, Kiminori Ishido
Patented Case
View Patent ↗
Granted: Sep 14, 2004
Filed: Nov 29, 2001
Inventors
Hideo Kikuchi
Kiminori Ishido
Assignee (at issue)
NEC Toppan Circuit Solutions, Inc.
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.