Granted Patent
Utility
US 5,548,136 · App. 08/272,041
Substrate with a compound semiconductor surface layer and method for preparing the same
Inventor:
Shuji Asai
Patented Case
View Patent ↗
Granted: Aug 20, 1996
Filed: Jul 8, 1994
Inventor
Shuji Asai
Assignee (at issue)
NEC CORPORATION
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.