Granted Patent
Utility
US 5,297,158 · App. 07/871,913
Semiconductor laser device including a gallium-aluminum arsenic compound
Inventors:
Hiroki Naitou, Masahiro; Kume, Issei Ota, Hirokazu Shimizu
Patented Case
View Patent ↗
Granted: Mar 22, 1994
Filed: Apr 21, 1992
Inventors
Hiroki Naitou
Masahiro; Kume
Issei Ota
Hirokazu Shimizu
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.