Granted Patent
Utility
US 5,561,682 · App. 08/388,507
Semiconductor optical device and method for fabricating the same
Inventors:
Masahiro Aoki, Tsuyoshi Taniwatari, Makoto Suzuki, Takayuki Tsutsui
Patented Case
View Patent ↗
Granted: Oct 1, 1996
Filed: Feb 14, 1995
Inventors
Masahiro Aoki
Tsuyoshi Taniwatari
Makoto Suzuki
Takayuki Tsutsui
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.