Granted Patent
Utility
US 5,221,413 · App. 07/690,429
Method for making low defect density semiconductor heterostructure and devices made thereby
Inventors:
Daniel Brasen, Eugene A. Fitzgerald, Martin L. Green, Ya-Hong Xie
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Apr 24, 1991
Inventors
Daniel Brasen
Eugene A. Fitzgerald
Martin L. Green
Ya-Hong Xie
Assignee (at issue)
AT&T Bell Laboratories
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.