Granted Patent
Utility
US 5,525,840 · App. 08/338,207
Semiconductor device having an alignment mark
Inventor:
Makoto Tominaga
Patented Case
View Patent ↗
Granted: Jun 11, 1996
Filed: Nov 9, 1994
Inventor
Makoto Tominaga
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.