Granted Patent
Utility
US 5,400,355 · App. 08/217,174
Semiconductor double-channel-planar-buried-heterostructure laser diode effective against leakage current
Inventor:
Tomoko Ishida
Patented Case
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Granted: Mar 21, 1995
Filed: Mar 24, 1994
Inventor
Tomoko Ishida
Assignee (at issue)
NEC CORPORATION
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.