Granted Patent
Utility
US 6,821,801 · App. 10/777,071
Manufacturing method of semiconductor laser diode
Inventors:
Hiroshi Sato, Tomonobu Tsuchiya, Masahiro Aoki, Takeshi Kitatani, Noritsugu Takahashi
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Feb 13, 2004
Inventors
Hiroshi Sato
Tomonobu Tsuchiya
Masahiro Aoki
Takeshi Kitatani
Noritsugu Takahashi
Assignees (at issue)
HITACHI, LTD.
Opnext Japan, 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.