Issued Patents All Time
Showing 26–50 of 59 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5384454 | Portable electronic apparatus | — | 1995-01-24 |
| 5381478 | Cipher communication system for transaction data | — | 1995-01-10 |
| 5369760 | Data processing system | — | 1994-11-29 |
| 5365045 | Portable electric device | — | 1994-11-15 |
| 5349649 | Portable electronic device supporting multi-protocols | — | 1994-09-20 |
| 5339400 | Portable electronic device capable of selectively providing unused area size of whole memory or memory segments to external device | — | 1994-08-16 |
| 5293029 | System for mutually certifying an IC card and an IC card terminal | — | 1994-03-08 |
| 5288978 | Mutual authentication system and method which checks the authenticity of a device before transmitting authentication data to the device | — | 1994-02-22 |
| 5225664 | Mutual authentication system | — | 1993-07-06 |
| 5226155 | Method and system for allocating file space in memory of IC card | — | 1993-07-06 |
| 5202922 | Data communication system | — | 1993-04-13 |
| 5161231 | Processing system which transmits a predetermined error code upon detection of an incorrect transmission code | — | 1992-11-03 |
| 5161256 | Method and system for allocating file area in memory area of IC card | — | 1992-11-03 |
| 5097118 | Portable electronic apparatus for writing and reading data to and from an external device and performing data memory allocation | — | 1992-03-17 |
| 5093785 | Portable electronic device with memory having data pointers and circuitry for determining whether a next unwritten memory location exist | — | 1992-03-03 |
| 5089951 | Microcomputer incorporating memory | — | 1992-02-18 |
| 4988855 | Portable electronic apparatus | — | 1991-01-29 |
| 4985615 | Portable electronic apparatus having key data for limiting memory access | — | 1991-01-15 |
| 4983816 | Portable electronic device | — | 1991-01-08 |
| 4967391 | Data string retrieval apparatus for IC card | — | 1990-10-30 |
| 4949240 | Data storage system having circuitry for dividing received data into sequential wards each stored in storage region identified by chain data | — | 1990-08-14 |
| 4939353 | Processing system for enabling data communication with a self-diagnose device | — | 1990-07-03 |
| 4917965 | Multifilament Nb.sub.3 Al superconducting linear composite articles | Kiyoshi Inoue, Takao Takeuchi, Michio Kosuge | 1990-04-17 |
| 4901276 | Portable electronic apparatus having a function of checking for empty areas in which to write data | — | 1990-02-13 |
| 4887234 | Portable electronic device with plural memory areas | — | 1989-12-12 |