Granted Patent
Utility
US 5,319,219 · App. 07/887,468
Single quantum well II-VI laser diode without cladding
Inventors:
Hwa Cheng, James M. DePuydt, Michael A. Haase, Jun Qiu
Patented Case
View Patent ↗
Granted: Jun 7, 1994
Filed: May 22, 1992
Inventors
Hwa Cheng
James M. DePuydt
Michael A. Haase
Jun Qiu
Assignee (at issue)
Minnesota Mining and Manufacturing Company
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.