Granted Patent
Utility
US 5,426,613 · App. 07/972,907
Semiconductor memory device with improved substrate arrangement to permit forming a plurality of different types of random access memory, and a testing method therefor
Inventors:
Yasushi Takahashi, Hidetoshi Iwai, Satoshi Oguchi, Hisashi Nakamura, Hiroyuki Uchiyama, Toshitugu Takekuma, Shigetoshi Sakomura, Kazuyuki Miyazawa, Masamichi Ishihara, Ryoichi Hori, Takeshi Kizaki, Yoshihisa Koyama, Haruo Ii, Masaya Muranaka, Hidetomo Aoyagi, Hiromi Matsuura
Patented Case
View Patent ↗
Granted: Jun 20, 1995
Filed: Nov 6, 1992
Inventors
Yasushi Takahashi
Hidetoshi Iwai
Satoshi Oguchi
Hisashi Nakamura
Hiroyuki Uchiyama
Toshitugu Takekuma
Shigetoshi Sakomura
Kazuyuki Miyazawa
Masamichi Ishihara
Ryoichi Hori
Takeshi Kizaki
Yoshihisa Koyama
Haruo Ii
Masaya Muranaka
Hidetomo Aoyagi
Hiromi Matsuura
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.