Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7957200 | Semiconductor memory device and read access method thereof | — | 2011-06-07 |
| 7800960 | Voltage generator for nonvolatile memory and writing and erasing method of nonvolatile memory | Yasuhiro Tonda, Hidetoshi Ozoe, Hideaki Uemura, Junichi Yamada, Tatsuya Saito | 2010-09-21 |
| 7660085 | Semiconductor device | Hiroshi Furuta, Hidetaka Natsume, Toshikatsu Jinbo, Kiyokazu Hashimoto | 2010-02-09 |
| 7568146 | Semiconductor storage device and pseudo SRAM | Hiroyuki Takahashi, Hiroyuki Matsubara | 2009-07-28 |
| 6680872 | Virtual ground semiconductor memory device | — | 2004-01-20 |
| 6600689 | Virtual ground semiconductor memory device | — | 2003-07-29 |
| 6496405 | Semiconductor memory apparatus and method for outputting data | — | 2002-12-17 |
| 6479874 | Semiconductor memory device having multilevel memory cell and method of manufacturing the same | Masao Kunitou, Kazuyuki Yamasaki, Tetsuji Togami, Hironori Sakamoto, Kiyokazu Hashimoto | 2002-11-12 |
| 6181625 | Semiconductor storage memory having a reference voltage generation circuit generating the word line voltage | — | 2001-01-30 |
| 6108247 | Voltage generation circuit for multivalued cell type mask ROM | Takayuki Suzu | 2000-08-22 |
| 6075722 | Semiconductor multivalued memory device determining multivalued read-out datum by comparing it with corresponding reference data | — | 2000-06-13 |
| 5657274 | Semiconductor memory device adapted to a high-speed operation, a low supply voltage, and the use of a multilevel cell with a plurality of threshold values as a memory cell transistor | — | 1997-08-12 |