Granted Patent
Utility
US 6,621,843 · App. 09/842,521
Long wavelength surface-emitting semiconductor laser device and method for manufacturing the same
Inventors:
Byueng-Su Yoo, O-Kyun Kwon, Young-Gu Ju
Patented Case
View Patent ↗
Granted: Sep 16, 2003
Filed: Apr 25, 2001
Inventors
Byueng-Su Yoo
O-Kyun Kwon
Young-Gu Ju
Assignee (at issue)
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
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.