Issued Patents All Time
Showing 25 most recent of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11404119 | Non-volatile memory device and challenge response method | Yuhei Yoshimoto | 2022-08-02 |
| 11195582 | Non-volatile memory device and method of writing to non-volatile memory device | Yuhei Yoshimoto, Naoto Kii | 2021-12-07 |
| 10574639 | Authentication apparatus utilizing physical characteristic | — | 2020-02-25 |
| 10559051 | Image forgery protection apparatus | — | 2020-02-11 |
| 10410719 | Non-volatile memory device including a memory cell in a variable state and a memory cell in an initial state | — | 2019-09-10 |
| 10096359 | Nonvolatile memory device having resistive memory cells including at least one resistive memory cell initial state | Yuhei Yoshimoto | 2018-10-09 |
| 10049734 | Data storing method of non-volatile memory device by assigning an initial state to data | — | 2018-08-14 |
| 9948471 | Tamper-resistant non-volatile memory device and integrated circuit card | — | 2018-04-17 |
| 9921975 | Cryptographic processing device having a non-volatile memory including memory cells in an initial or a variable state | Takuji Maeda, Shinji Inoue, Masato Suto | 2018-03-20 |
| 9898598 | Authentication system having a non-volatile memory including memory cells in initial or variable states and a host computer for performing authentication therebetween | — | 2018-02-20 |
| 9892783 | Non-volatile memory device including memory cells having variable resistance values | Yuhei Yoshimoto | 2018-02-13 |
| 9842645 | Nonvolatile memory device including nonvolatile memory and resistance-time converter, and integrated circuit card including nonvolatile memory device | Hiroyuki Tezuka | 2017-12-12 |
| 9823899 | Random number processing device generating random numbers by using data read from non-volatile memory cells, and integrated circuit card | — | 2017-11-21 |
| 9811476 | Encryption and recording apparatus, encryption and recording system, and encryption and recording method | Takuji Maeda, Shinji Inoue | 2017-11-07 |
| 9653161 | Tamper-resistant non-volatile memory device comprising an arithmetic circuit that, in operation, calculates a binary reference value based on at least a part of the pieces of resistance value information, a read circuit that, in operation, selectively assigns, based on the binary reference value, one of two values to each of the pieces of resistance value information, and a write circuit that, in operation, performs a write operation corresponding to one of the two values among memory cells | Yuhei Yoshimoto | 2017-05-16 |
| 9640238 | Data generating device and data generating method | Satoru Ogasahara, Yuhei Yoshimoto | 2017-05-02 |
| 9600237 | Random number processing apparatus and random number processing method | — | 2017-03-21 |
| 9548113 | Tamper-resistant non-volatile memory device | Yuhei Yoshimoto | 2017-01-17 |
| 9543007 | Semiconductor device including memory cell and sense amplifer, and IC card including semiconductor device | Ryotaro Azuma | 2017-01-10 |
| 9536581 | Tamper-resistant non-volatile memory device | Yuhei Yoshimoto, Satoru Ogasahara | 2017-01-03 |
| 9390791 | Resistance change non-volatile storage memory device and method | Yuhei Yoshimoto, Satoru Ogasahara | 2016-07-12 |
| 9378817 | Variable resistance nonvolatile memory element writing method and variable resistance nonvolatile memory device | Ken Kawai, Kazuhiko Shimakawa | 2016-06-28 |
| 9251896 | Variable resistance nonvolatile memory device and method for writing into the same | Yuichiro Ikeda, Kazuhiko Shimakawa, Ken Kawai | 2016-02-02 |
| 9202565 | Write method for writing to variable resistance nonvolatile memory element and variable resistance nonvolatile memory device | Ken Kawai, Kazuhiko Shimakawa | 2015-12-01 |
| 9183925 | Variable resistance nonvolatile memory device and method of performing the forming operation | Ryotaro Azuma | 2015-11-10 |