Granted Patent
Utility
US 6,822,989 · App. 09/515,285
Semiconductor laser and a manufacturing method for the same
Inventors:
Toshiya Fukuhisa, Masaya Manno, Akio Yoshikawa
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Feb 29, 2000
Inventors
Toshiya Fukuhisa
Masaya Manno
Akio Yoshikawa
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, 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.