Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5699308 | Semiconductor memory device having two layers of bit lines arranged crossing with each other | Motomu Ukita | 1997-12-16 |
| 5687111 | Static type semiconductor memory device capable of operating at a low voltage and reducing a memory cell area | Kunihiko Kozaru, Toru Shiomi | 1997-11-11 |
| 5663905 | Semiconductor memory device comprising two kinds of memory cells operating in different access speeds and methods of operating and manufacturing the same | Ryuichi Matsuo, Kazutoshi Hirayama, Shigeki Ohbayashi | 1997-09-02 |
| 5659515 | Semiconductor memory device capable of refresh operation in burst mode | Ryuichi Matsuo | 1997-08-19 |