Inventor · disambiguated record
Yasuo Iijima
Also filed as: FUJITA TAKASHI · IIJIMA YASUO
61 granted patents·2 pending applications·3,033 citations·filing 1975–2022
99Inventor score
Files withTOSHIBA KK44MATSUSHITA ELECTRIC INDUSTRIAL CO LTD7NAT INST FOR MATERIALS SCIENCE4NAT INST MATERIALS SCIENCE2NAT RES INST METALS2
Top patents by PatentIndex Score
63 records- 0194US5288978AMutual authentication system and method which checks the authenticity of a device before transmitting authentication data to the deviceTOSHIBA KK·Filed 1991·Granted Feb 22, 1994·248 cites·14 claims
- 0294US4800520APortable electronic device with garbage collection functionTOSHIBA KK·Filed 1986·Granted Jan 24, 1989·291 cites·5 claims
- 0392US5349649APortable electronic device supporting multi-protocolsTOSHIBA KK·Filed 1992·Granted Sep 20, 1994·165 cites·17 claims
- 0491US5581708AData transmission system using electronic apparatus having a plurality of transmission protocolsTOSHIBA KK·Filed 1994·Granted Dec 3, 1996·140 cites·7 claims
- 0590US4239835AMagnetic recording mediumMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1977·Granted Dec 16, 1980·31 cites·9 claims
- 0689US4887234APortable electronic device with plural memory areasTOSHIBA KK·Filed 1989·Granted Dec 12, 1989·184 cites·6 claims
- 0785US4985615APortable electronic apparatus having key data for limiting memory accessTOSHIBA KK·Filed 1989·Granted Jan 15, 1991·130 cites·4 claims
- 0884US5089951AMicrocomputer incorporating memoryTOSHIBA KK·Filed 1988·Granted Feb 18, 1992·44 cites·23 claims
- 0981US5293029ASystem for mutually certifying an IC card and an IC card terminalTOSHIBA KK·Filed 1992·Granted Mar 8, 1994·126 cites·2 claims
- 1079US5093785APortable electronic device with memory having data pointers and circuitry for determining whether a next unwritten memory location existTOSHIBA KK·Filed 1989·Granted Mar 3, 1992·88 cites·2 claims
- 1179US4917965AMultifilament Nb3 Al superconducting linear composite articlesNAT RES INST METALS·Filed 1989·Granted Apr 17, 1990·36 cites·18 claims
- 1278US5225664AMutual authentication systemTOSHIBA KK·Filed 1991·Granted Jul 6, 1993·97 cites·19 claims
- 1378US5202922AData communication systemTOSHIBA KK·Filed 1991·Granted Apr 13, 1993·97 cites·14 claims
- 1477US4053941AOil impregnated electric deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1975·Granted Oct 11, 1977·25 cites·6 claims
- 1573US12410509B2Copper-coated aluminum wire material and production method thereforNAT INST MATERIALS SCIENCE·Filed 2022·Granted Sep 9, 2025·0 cites·20 claims
- 1672US6508889B2Process for the production of Nb3A1 extra-fine multifilamentary superconducting wireNAT INST FOR MATERIALS SCIENCE·Filed 2001·Granted Jan 21, 2003·8 cites·7 claims
- 1770US5748915ATransmission method of changing protocol and data processing apparatus using this methodTOSHIBA KK·Filed 1996·Granted May 5, 1998·39 cites·17 claims
- 1870US5515532AFile management system for memory cardTOSHIBA KK·Filed 1994·Granted May 7, 1996·61 cites·5 claims
- 1970US4983816APortable electronic deviceTOSHIBA KK·Filed 1989·Granted Jan 8, 1991·50 cites·13 claims
- 2069US4949240AData storage system having circuitry for dividing received data into sequential wards each stored in storage region identified by chain dataTOSHIBA KK·Filed 1988·Granted Aug 14, 1990·49 cites·20 claims
- 2169US4901276APortable electronic apparatus having a function of checking for empty areas in which to write dataTOSHIBA KK·Filed 1989·Granted Feb 13, 1990·42 cites·5 claims
- 2267US6372054B1Process for producing ultrafine multifilamentary Nb3(A1,Ge) or Nb3(A1,Si) superconducting wireJP NAT RES INST FOR METALS·Filed 2000·Granted Apr 16, 2002·23 cites·8 claims
- 2367US4839792APortable electronic apparatus with a device for determining data validityTOSHIBA KK·Filed 1987·Granted Jun 13, 1989·41 cites·9 claims
- 2466US5161231AProcessing system which transmits a predetermined error code upon detection of an incorrect transmission codeTOSHIBA KK·Filed 1991·Granted Nov 3, 1992·52 cites·6 claims
- 2566US4939353AProcessing system for enabling data communication with a self-diagnose deviceTOSHIBA KK·Filed 1988·Granted Jul 3, 1990·34 cites·21 claims
- 2662US5678029AMemory card available for various formatsTOSHIBA KK·Filed 1994·Granted Oct 14, 1997·28 cites·8 claims
- 2762US5161256AMethod and system for allocating file area in memory area of ic cardTOSHIBA KK·Filed 1989·Granted Nov 3, 1992·90 cites·7 claims
- 2862US2024301163A1Polymerizable composition and resin-impregnated superconducting coilRIMTEC CORP·Filed 2021·Application pending·0 cites
- 2960US4833595APortable electronic apparatus with data remaining counterTOSHIBA KK·Filed 1987·Granted May 23, 1989·74 cites·9 claims
- 3059US5437028AFile management system with file-size flexibilityTOSHIBA KK·Filed 1994·Granted Jul 25, 1995·33 cites·17 claims
- 3159US5226155AMethod and system for allocating file space in memory of ic cardTOSHIBA KK·Filed 1989·Granted Jul 6, 1993·84 cites·4 claims
- 3259US4068286AOil-impregnated polypropylene capacitorMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1976·Granted Jan 10, 1978·10 cites·2 claims
- 3357US5963410AInsulation testing method and apparatus thereforMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Oct 5, 1999·20 cites·5 claims
- 3457US5864238AHigh speed dynamic run-out testing apparatus and methodMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1997·Granted Jan 26, 1999·18 cites·27 claims
- 3556US2024428965A1Niobium-aluminum precursor wire, niobium-aluminum precursor twisted wire, niobium-aluminum superconducting wire, and niobium-aluminum superconducting twisted wireNAT INST MATERIALS SCIENCE·Filed 2022·Application pending·0 cites
- 3655US5365045APortable electric deviceTOSHIBA KK·Filed 1991·Granted Nov 15, 1994·28 cites·10 claims
- 3755US4419145AProcess for producing Nb3 Sn superconductorNAT RES INST METALS·Filed 1982·Granted Dec 6, 1983·15 cites·8 claims
- 3853US6376099B1CU-containing NB3A1 multifilamentary superconductive wire and process for producing the sameAGENCY IND SCIENCE TECHN·Filed 2000·Granted Apr 23, 2002·10 cites·8 claims
- 3953US5929428AFile managing method requiring a change in key data and IC card device using the methodTOSHIBA KK·Filed 1997·Granted Jul 27, 1999·34 cites·28 claims
- 4053US5381478ACipher communication system for transaction dataTOSHIBA KK·Filed 1992·Granted Jan 10, 1995·25 cites·3 claims
- 4153US4293739ACircuit with crosstalk elimination capabilityNIPPON ELECTRIC CO·Filed 1980·Granted Oct 6, 1981·8 cites·9 claims
- 4252US5339400APortable electronic device capable of selectively providing unused area size of whole memory or memory segments to external deviceTOSHIBA KK·Filed 1991·Granted Aug 16, 1994·23 cites·8 claims
- 4351US5867029AMethod of nondestructive insulation test and a nondestructive insulation testing apparatusMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1996·Granted Feb 2, 1999·15 cites·9 claims
- 4451US4827512AProgrammable portable electronic deviceTOSHIBA KK·Filed 1986·Granted May 2, 1989·56 cites·8 claims
- 4550US7296289B2Setting or changing an access condition for an access management apparatus and method of a portable electronic deviceTOSHIBA KK·Filed 2004·Granted Nov 13, 2007·0 cites·11 claims
- 4650US5594348ASurge testing method in decompressed atmosphere for a small-size electric machine and apparatus thereofMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 1995·Granted Jan 14, 1997·14 cites·3 claims
- 4750US4845717AIC card having two output buffersTOSHIBA KK·Filed 1987·Granted Jul 4, 1989·16 cites·9 claims
- 4850US4841131APortable electronic device with means for checking data validity during read-outTOSHIBA KK·Filed 1987·Granted Jun 20, 1989·15 cites·7 claims
- 4949US7134181B2Method for producing Nb3Al superconductive wireNAT INST FOR MATERIALS SCIENCE·Filed 2003·Granted Nov 14, 2006·0 cites·7 claims
- 5049US5517014AFile management apparatus for IC cardTOSHIBA KK·Filed 1994·Granted May 14, 1996·65 cites·5 claims
Showing the top 50 of 63 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →