Granted Patent
Utility
US 6,775,439 · App. 10/183,529
Optical circuit device and optical transceiver
Inventors:
Hideaki Takano, Masahiko Kobayashi
Patented Case
View Patent ↗
Granted: Aug 10, 2004
Filed: Jun 28, 2002
Inventors
Hideaki Takano
Masahiko Kobayashi
Assignees (at issue)
HITACHI, LTD.
HITACHI CABLE, 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.