Inventor · disambiguated record
Akira Yamagiwa
Also filed as: YAMAGIWA AKIRA
57 granted patents·4 pending applications·3,353 citations·filing 1978–2010
99Inventor score
Top patents by PatentIndex Score
61 records- 0199US5087829AHigh speed clock distribution systemHITACHI LTD·Filed 1989·Granted Feb 11, 1992·235 cites·21 claims
- 0298US6580295B2Signal transmission systemHITACHI LTD·Filed 2001·Granted Jun 17, 2003·221 cites·16 claims
- 0398US6208525B1Process for mounting electronic device and semiconductor deviceHITACHI LTD·Filed 1998·Granted Mar 27, 2001·270 cites·12 claims
- 0498US6034878ASource-clock-synchronized memory system and memory unitHITACHI LTD·Filed 1997·Granted Mar 7, 2000·537 cites·31 claims
- 0597US4812684AMultiphase clock distribution for VLSI chipHITACHI LTD·Filed 1988·Granted Mar 14, 1989·99 cites·6 claims
- 0695US5361188ACooling apparatus of electronic equipmentHITACHI LTD·Filed 1993·Granted Nov 1, 1994·205 cites·3 claims
- 0792US6780677B2Process for mounting electronic device and semiconductor deviceHITACHI LTD·Filed 2002·Granted Aug 24, 2004·43 cites·7 claims
- 0892US6163464AApparatus for interconnecting logic boardsHITACHI LTD·Filed 1998·Granted Dec 19, 2000·159 cites·13 claims
- 0991US4249091ALogic circuitHITACHI LTD·Filed 1978·Granted Feb 3, 1981·29 cites·10 claims
- 1090US5428503AJet cooling apparatus for cooling electronic equipment and computer having the same mounted thereonHITACHI LTD·Filed 1994·Granted Jun 27, 1995·96 cites·11 claims
- 1190US5365402ACooling apparatus of electronic deviceHITACHI LTD·Filed 1991·Granted Nov 15, 1994·120 cites·15 claims
- 1289US5504924ACooling system of electronic computer using flexible members in contact with semiconductor devices on boardsHITACHI LTD·Filed 1994·Granted Apr 2, 1996·151 cites·18 claims
- 1387US6461896B1Process for mounting electronic device and semiconductor deviceHITACHI LTD·Filed 2000·Granted Oct 8, 2002·27 cites·9 claims
- 1487US5872471ASimultaneous bidirectional transmission circuitHITACHI LTD·Filed 1996·Granted Feb 16, 1999·62 cites·16 claims
- 1586US5195576ALsi cooling apparatus and computer cooling apparatusHITACHI LTD·Filed 1991·Granted Mar 23, 1993·87 cites·5 claims
- 1684US6049221ASemiconductor integrated circuit system having function of automatically adjusting output resistance valueHITACHI LTD·Filed 1998·Granted Apr 11, 2000·46 cites·16 claims
- 1784US5497263AVariable delay circuit and clock signal supply unit using the sameHITACHI LTD·Filed 1993·Granted Mar 5, 1996·43 cites·14 claims
- 1883US6335867B1Apparatus for interconnecting logic boardsHITACHI LTD·Filed 2000·Granted Jan 1, 2002·31 cites·10 claims
- 1982US7123048B2Signal transmitting device suited to fast signal transmissionHITACHI LTD·Filed 2005·Granted Oct 17, 2006·5 cites·6 claims
- 2081US5621774AMethod and apparatus for synchronizing parallel data transferHITACHI LTD·Filed 1994·Granted Apr 15, 1997·95 cites·5 claims
- 2181US5548226AFast transmission line implemented with receiver, driver, terminator and IC arrangementsHITACHI LTD·Filed 1994·Granted Aug 20, 1996·49 cites·17 claims
- 2277US6496886B1Directional coupling bus system using printed boardHITACHI LTD·Filed 1999·Granted Dec 17, 2002·40 cites·21 claims
- 2377US5867541AMethod and system for synchronizing data having skewHITACHI LTD·Filed 1995·Granted Feb 2, 1999·102 cites·10 claims
- 2477US5568063ASignal transmitting device, circuit block and integrated circuit suited to fast signal transmissionHITACHI LTD·Filed 1995·Granted Oct 22, 1996·21 cites·11 claims
- 2576US6737741B2Process for mounting electronic device and semiconductor deviceHITACHI LTD·Filed 2002·Granted May 18, 2004·13 cites·2 claims
- 2675US5852728AUninterruptible clock supply apparatus for fault tolerant computer systemHITACHI LTD·Filed 1996·Granted Dec 22, 1998·76 cites·4 claims
- 2775US4329597ALogic circuitHITACHI LTD·Filed 1979·Granted May 11, 1982·14 cites·16 claims
- 2872US6069793ACircuit module and information processing apparatusHITACHI LTD·Filed 1998·Granted May 30, 2000·55 cites·13 claims
- 2972US5794020AData transfer apparatus fetching reception data at maximum margin of timingHITACHI LTD·Filed 1996·Granted Aug 11, 1998·80 cites·23 claims
- 3071US6766404B1Branch bus system for inter-LSI data transmissionHITACHI LTD·Filed 2000·Granted Jul 20, 2004·16 cites·10 claims
- 3170US6211703B1Signal transmission systemHITACHI LTD·Filed 1997·Granted Apr 3, 2001·46 cites·28 claims
- 3268US6266242B1Circuit module and information processing apparatusHITACHI LTD·Filed 2000·Granted Jul 24, 2001·12 cites·28 claims
- 3367US7372292B2Signal transmitting device suited to fast signal transmissionHITACHI LTD·Filed 2002·Granted May 13, 2008·4 cites·44 claims
- 3465US6873179B2Signal transmitting device suited to fast signal transmissionHITACHI LTD·Filed 2002·Granted Mar 29, 2005·5 cites·44 claims
- 3564US5666302ASimultaneous bidirectional transmission apparatus for transmitting and receiving differential signalsHITACHI LTD·Filed 1995·Granted Sep 9, 1997·34 cites·9 claims
- 3662US5668834ASignal transmitting device suitable for fast signal transmission including an arrangement to reduce signal amplitude in a second stage transmission lineHITACHI LTD·Filed 1995·Granted Sep 16, 1997·24 cites·29 claims
- 3761US7015717B2Signal transmitting device suited to fast signal transmissionHITACHI LTD·Filed 2004·Granted Mar 21, 2006·2 cites·40 claims
- 3861US6441639B1Circuit module connected to a transmission line including arrangement to suppress reflections at a branch point of the transmission lineHITACHI LTD·Filed 2000·Granted Aug 27, 2002·3 cites·9 claims
- 3960US6768346B2Signal transmission systemHITACHI LTD·Filed 2003·Granted Jul 27, 2004·5 cites·14 claims
- 4056US7911224B2Signal transmitting device suited to fast signal transmissionHITACHI LTD·Filed 2008·Granted Mar 22, 2011·0 cites·106 claims
- 4156US6420900B2Semiconductor memoryHITACHI LTD·Filed 2001·Granted Jul 16, 2002·2 cites·67 claims
- 4255US5627481AFast transmission line implemented with receiver, driver, terminator and IC arrangementsHITACHI LTD·Filed 1996·Granted May 6, 1997·16 cites·10 claims
- 4355US4516039ALogic circuit utilizing a current switch circuit having a non-threshold transfer characteristicHITACHI LTD·Filed 1982·Granted May 7, 1985·11 cites·17 claims
- 4453US8106677B2Signal transmitting device suited to fast signal transmissionTAKEKUMA TOSHITSUGU·Filed 2010·Granted Jan 31, 2012·0 cites·106 claims
- 4553US7295034B2Signal transmitting device suited to fast signal transmissionHITACHI LTD·Filed 2006·Granted Nov 13, 2007·0 cites·39 claims
- 4651US5452436ASystem for connecting plurality of electronic units to data and clock buses wherein transmitting and receiving data in synchronization with transmitting and receiving clock signalsHITACHI LTD·Filed 1995·Granted Sep 19, 1995·32 cites·9 claims
- 4749US5787261AData transfer system, computer system and active-line inserted/withdrawn functional circuit boardHITACHI LTD·Filed 1995·Granted Jul 28, 1998·21 cites·15 claims
- 4849US5145800AMethod of wiring for power supply to large-scale integrated circuitHITACHI LTD·Filed 1991·Granted Sep 8, 1992·19 cites·8 claims
- 4948US2008306722A1Logic verification systemRENESAS TECH CORP·Filed 2008·Application pending·0 cites
- 5047US6829574B1Logic emulation module and logic emulation boardRENESAS TECH CORP·Filed 1999·Granted Dec 7, 2004·16 cites·13 claims
Showing the top 50 of 61 patent records by PatentIndex Score.
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