Granted Patent
Utility
US 6,791,134 · App. 10/205,421
Semiconductor memory device and manufacturing method thereof
Inventors:
Shinichiro Kimura, Toshiaki Yamanaka, Kiyoo Itoh, Takeshi Sakata, Tomonori Sekiguchi, Hideyuki Matsuoka
Patented Case
View Patent ↗
Granted: Sep 14, 2004
Filed: Jul 26, 2002
Inventors
Shinichiro Kimura
Toshiaki Yamanaka
Kiyoo Itoh
Takeshi Sakata
Tomonori Sekiguchi
Hideyuki Matsuoka
Assignee (at issue)
HITACHI, 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.