Granted Patent
Utility
US 5,763,939 · App. 08/529,341
Semiconductor device having a perforated base film sheet
Inventor:
Chikara Yamashita
Patented Case
View Patent ↗
Granted: Jun 9, 1998
Filed: Sep 18, 1995
Inventor
Chikara Yamashita
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.