Granted Patent
Utility
US 6,236,601 · App. 09/477,665
Semiconductor memory device having faulty cells
Inventors:
Kunihiro Katayama, Takayuki Tamura, Satoshi Watatani, Kiyoshi Inoue, Shigemasa Shiota, Masashi Naito
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Jan 5, 2000
Inventors
Kunihiro Katayama
Takayuki Tamura
Satoshi Watatani
Kiyoshi Inoue
Shigemasa Shiota
Masashi Naito
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.