Granted Patent
Utility
US 6,590,809 · App. 10/040,332
Non-volatile semiconductor memory device
Inventors:
Takanori Yamazoe, Hiroshi Yoshigi, Yoshiaki Kamigaki, Kozo Katayama, Shinichi Minami, Takeo Kanai
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: Jan 9, 2002
Inventors
Takanori Yamazoe
Hiroshi Yoshigi
Yoshiaki Kamigaki
Kozo Katayama
Shinichi Minami
Takeo Kanai
Assignees (at issue)
HITACHI, LTD.
Hitachi Ulsi Systems Co., Ltd.
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.