Granted Patent
Utility
US 5,844,842 · App. 08/249,899
Nonvolatile semiconductor memory device
Inventors:
Koichi Seki, Takeshi Wada, Tadashi Muto, Kazuyoshi Shoji, Yasurou Kubota, Hitoshi Kume
Patented Case
View Patent ↗
Granted: Dec 1, 1998
Filed: May 26, 1994
Inventors
Koichi Seki
Takeshi Wada
Tadashi Muto
Kazuyoshi Shoji
Yasurou Kubota
Hitoshi Kume
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.