Issued Patents All Time
Showing 1–25 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6813191 | Microcomputer with nonvolatile memory protected against false erasing or writing | — | 2004-11-02 |
| 6725375 | Microcomputer and method and apparatus for changing the contents of the memory in the microcomputer | — | 2004-04-20 |
| 6658493 | Microcomputer exchanging data with host computer | — | 2003-12-02 |
| 6480869 | Random-number generating circuit, non-contact IC card having random-number generating circuit, reader/writer, and method of testing an apparatus having the random generating circuit | — | 2002-11-12 |
| 6198619 | Capacitor network | — | 2001-03-06 |
| 6040786 | Recognition system and recognition method for non-contact IC cards | — | 2000-03-21 |
| 5896325 | IC card with error processing unit for sense amplifiers | — | 1999-04-20 |
| 5837982 | Antenna for non-contact IC card gate facility | — | 1998-11-17 |
| 5796943 | Communication apparatus | — | 1998-08-18 |
| 5753902 | IC card, reader/writer | — | 1998-05-19 |
| 5727230 | Apparatus for electromagnetic communication between a computer and a non-contact IC card | — | 1998-03-10 |
| 5719387 | IC card including a memory, a password collating means and an access permitting means for permitting access to the memory | — | 1998-02-17 |
| 5698836 | IC card | — | 1997-12-16 |
| 5661286 | Noncontacting IC card system and gate facility and antenna mechanism | — | 1997-08-26 |
| 5619529 | Non-contact IC card and non-contact IC card reader/writer | — | 1997-04-08 |
| 5604342 | Noncontact card and card system | — | 1997-02-18 |
| 5559996 | Level converter including wave-shaping circuit and emulator microcomputer incorporating the level converter | — | 1996-09-24 |
| 5530274 | Mos capacitor, Vpp switch circuit, charge pump circuit, eeprom, microcomputer, and IC card | — | 1996-06-25 |
| 5286962 | IC card for prevention of fraudulent use | Kenichi Takahira | 1994-02-15 |
| 5222232 | Apparatus and method for monitoring PROM access in a microcomputer | — | 1993-06-22 |
| 5220158 | Non-contact IC card and method of using the same | Kenichi Takahira | 1993-06-15 |
| 5212373 | Non-contact IC card | Toshiyuki Matsubara, Shigeru Furuta | 1993-05-18 |
| 5206938 | IC card with memory area protection based on address line restriction | — | 1993-04-27 |
| 5056089 | Memory device | Shigeru Furuta, Kenichi Takahira, Atsuo Yamaguchi, Takesi Inoue, Toshiyuki Matsubara | 1991-10-08 |
| 5047924 | Microcomputer | Toshiyuki Matsubara, Atsuo Yamaguchi, Kenichi Takahira, Shigeru Furuta, Takesi Inoue | 1991-09-10 |