Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9875635 | Proximity detection system | — | 2018-01-23 |
| 8497763 | Data carrier and data carrier system | Takashi Kubo, Yoshikazu Sugawara, Kenji Suzuki | 2013-07-30 |
| 8109445 | Data carrier and data carrier system | Yoshikazu Sugawara, Takashi Kubo | 2012-02-07 |
| 7834753 | Data carrier and data carrier system | Yoshikazu Sugawara, Naotaka Yasuda, Takashi Kubo, Yuming Tang | 2010-11-16 |
| 7355879 | Semiconductor integrated circuit, operating method thereof, and IC card including the circuit | Tadahiko Hirai | 2008-04-08 |
| 7102422 | Semiconductor booster circuit having cascaded MOS transistors | Yoshikazu Sugawara | 2006-09-05 |
| 6603346 | Semiconductor booster circuit having cascaded MOS transistors | Yoshikazu Sugawara | 2003-08-05 |
| 6000843 | Electrically alterable nonvolatile semiconductor memory | — | 1999-12-14 |
| 5592003 | Nonvolatile semiconductor memory and method of rewriting data thereto | Yasuo Sato | 1997-01-07 |
| 5557572 | Non-volatile semiconductor memory device | Hiroshi Mawatari | 1996-09-17 |
| 5550494 | Voltage selecting device for receiving a plurality of inputs and selectively outputting one thereof | — | 1996-08-27 |
| 5514994 | Bootstrap circuit | — | 1996-05-07 |
| 5491656 | Non-volatile semiconductor memory device and a method of using the same | — | 1996-02-13 |
| 5490110 | Non-volatile semiconductor memory device having disturb verify function | Yoshikazu Sugawara | 1996-02-06 |
| 5450341 | Non-volatile semiconductor memory device having memory cells, each for at least three different data writable thereinto selectively and a method of using the same | Toshio Wada, Yoshikazu Sugawara | 1995-09-12 |
| 5450354 | Non-volatile semiconductor memory device detachable deterioration of memory cells | Yoshikazu Sugawara | 1995-09-12 |
| 5412601 | Non-volatile semiconductor memory device capable of storing multi-value data in each memory cell | Toshio Wada | 1995-05-02 |
| 5408429 | Method of altering a non-volatile semiconductor memory device | — | 1995-04-18 |
| 5151906 | Semiconductor memory device having self-correcting function | — | 1992-09-29 |
| 4901320 | Self-correcting semiconductor memory device and microcomputer incorporating the same | Kouzi Tanagawa, Nobuhiro Tomari, Tomoaki Yoshida | 1990-02-13 |