Granted Patent
Utility
US 5,422,839 · App. 08/118,645
Semiconductor memory device
Inventors:
Koichiro Ishibashi, Katsuro Sasaki, Kunihiro Komiyaji, Toshiro Aoto, Sadayuki Morita
Patented Case
View Patent ↗
Granted: Jun 6, 1995
Filed: Sep 10, 1993
Inventors
Koichiro Ishibashi
Katsuro Sasaki
Kunihiro Komiyaji
Toshiro Aoto
Sadayuki Morita
Assignees (at issue)
HITACHI, LTD.
Hitachi VLSI Engineering Corp.
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.