Granted Patent
Utility
US 6,229,949 · App. 09/254,199
Polymer optical waveguide, optical integrated circuit, optical module and optical communication apparatus
Inventors:
Tatemi Ido, Hideaki Takano, Mari Koizumi
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Feb 26, 1999
Inventors
Tatemi Ido
Hideaki Takano
Mari Koizumi
Assignee (at issue)
HITACHI, 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.