Inventor · disambiguated record
Koji Yamanaka
Also filed as: YAMANAKA KOJI
77 granted patents·16 pending applications·925 citations·filing 1991–2023
99Inventor score
Top patents by PatentIndex Score
93 records- 0194US7425583B2Ion exchangerORGANO CORP·Filed 2005·Granted Sep 16, 2008·18 cites·5 claims
- 0292US6462622B1High-frequency amplifier and high-frequency multistage amplifierMITSUBISHI ELECTRIC CORP·Filed 2001·Granted Oct 8, 2002·57 cites·9 claims
- 0392US5616221AElectrolytic ionized water producing apparatusNEC CORP·Filed 1995·Granted Apr 1, 1997·91 cites·14 claims
- 0490US10559944B2Spark plug for internal combustion engineDENSO CORP·Filed 2017·Granted Feb 11, 2020·5 cites·8 claims
- 0589US5720869AEquipment and process for producing high-purity waterORGANO CORP·Filed 1995·Granted Feb 24, 1998·104 cites·23 claims
- 0687US9929542B2Spark plug and method for manufacturing the sameDENSO CORP·Filed 2017·Granted Mar 27, 2018·4 cites·8 claims
- 0787US5952127AMethod of fabricating a phase shifting reticleNEC CORP·Filed 1992·Granted Sep 14, 1999·51 cites·5 claims
- 0887US5635053AMethod and apparatus for cleaning electronic partsNEC CORP·Filed 1995·Granted Jun 3, 1997·90 cites·21 claims
- 0986US10406493B2Diluted solution production method and diluted solution production apparatusORGANO CORP·Filed 2015·Granted Sep 10, 2019·5 cites·7 claims
- 1084US7393445B2Ion exchangerORGANO CORP·Filed 2005·Granted Jul 1, 2008·7 cites·4 claims
- 1184US7173066B2Ion exchangerORGANO CORP·Filed 2005·Granted Feb 6, 2007·5 cites·1 claims
- 1283US5593554AElectrolytic ionized water producing apparatusORGANO CORP·Filed 1995·Granted Jan 14, 1997·62 cites·13 claims
- 1382US9111061B2Transistor characteristic calculation apparatus using large signal equivalent circuit modelOTSUKA HIROSHI·Filed 2012·Granted Aug 18, 2015·7 cites·5 claims
- 1482US6277205B1Method and apparatus for cleaning photomaskMITSUBISHI ELECTRIC CORP·Filed 2000·Granted Aug 21, 2001·19 cites·11 claims
- 1580US7026364B2Ion exchangerORGANO CORP·Filed 2002·Granted Apr 11, 2006·13 cites·9 claims
- 1680US6005468AAmorphous transformerHITACHI LTD·Filed 1998·Granted Dec 21, 1999·39 cites·11 claims
- 1780US5783790AWet treatment methodORGANO CORP·Filed 1996·Granted Jul 21, 1998·56 cites·17 claims
- 1879US7033472B2Electrodeionization water producing apparatus and method of producing deionized water using sameORGANO CORP·Filed 2003·Granted Apr 25, 2006·22 cites·18 claims
- 1978US10647648B2Method for purifying organic solventORGANO CORP·Filed 2016·Granted May 12, 2020·1 cites·6 claims
- 2078US7201832B2Electrodeionization deionized water producing apparatusORGANO CORP·Filed 2003·Granted Apr 10, 2007·20 cites·17 claims
- 2178US7094349B2Organic porous article having selective adsorption ability for boron, and boron removing module and ultra-pure water production apparatus using the sameORGANO CORP·Filed 2003·Granted Aug 22, 2006·16 cites·4 claims
- 2278US7019706B2High frequency module and antenna deviceMITSUBISHI ELECTRIC CORP·Filed 2003·Granted Mar 28, 2006·14 cites·10 claims
- 2378US6209553B1Method of and apparatus for washing photomask and washing solution for photomaskMITSUBISHIDENKI KABUSHIKI KAIS·Filed 2000·Granted Apr 3, 2001·16 cites·4 claims
- 2477US12409533B2Impact toolMAKITA CORP·Filed 2023·Granted Sep 9, 2025·0 cites·19 claims
- 2577US6636659B2Optical amplification apparatus and optical transmission systemFURUKAWA ELECTRIC CO LTD·Filed 2001·Granted Oct 21, 2003·15 cites·10 claims
- 2676US6841580B2Organic porous material, process for manufacturing the same, and organic porous ion exchangerORGANO CORP·Filed 2002·Granted Jan 11, 2005·12 cites·12 claims
- 2773US8247844B2Semiconductor device and manufacturing method thereofOISHI TOSHIYUKI·Filed 2009·Granted Aug 21, 2012·7 cites·3 claims
- 2872US5888357AApparatus and method for producing ionic water and system and method for producing electrolytic ionic waterFRONTEC INC·Filed 1996·Granted Mar 30, 1999·33 cites·9 claims
- 2971US12449461B2Charge sensorMITSUBISHI ELECTRIC CORP·Filed 2023·Granted Oct 21, 2025·0 cites·4 claims
- 3070US10170400B2Multi-finger transistor and semiconductor deviceMITSUBISHI ELECTRIC CORP·Filed 2015·Granted Jan 1, 2019·2 cites·2 claims
- 3170US6071376AMethod and apparatus for cleaning photomaskMITSUBISHI ELECTRIC CORP·Filed 1998·Granted Jun 6, 2000·35 cites·4 claims
- 3270US5273925AMethod of fabricating semiconductor memory device having a cylindrical capacitor electrodeNEC CORP·Filed 1991·Granted Dec 28, 1993·27 cites·5 claims
- 3368US10511267B2Power amplifierMITSUBISHI ELECTRIC CORP·Filed 2015·Granted Dec 17, 2019·2 cites·5 claims
- 3467US6690503B2Fault tolerant optical amplifierFURUKAWA ELECTRIC CO LTD·Filed 2001·Granted Feb 10, 2004·8 cites·2 claims
- 3566US11004674B2Substrate treatment method and substrate treatment equipmentORGANO CORP·Filed 2014·Granted May 11, 2021·1 cites·16 claims
- 3666US10523158B2Load modulation amplifierMITSUBISHI ELECTRIC CORP·Filed 2016·Granted Dec 31, 2019·2 cites·17 claims
- 3764US11901174B2Substrate treatment method and substrate treatment equipmentORGANO CORP·Filed 2021·Granted Feb 13, 2024·0 cites·1 claims
- 3864US6951609B2High-purity water producing apparatusORGANO CORP·Filed 2003·Granted Oct 4, 2005·8 cites·8 claims
- 3962US6687521B2Noninvasion biological optical measuring instrument, measured portion holding device, and method for manufacturing the sameHAMAMATSU PHOTONICS KK·Filed 2001·Granted Feb 3, 2004·30 cites·25 claims
- 4061US10355130B2Semiconductor deviceMITSUBISHI ELECTRIC CORP·Filed 2015·Granted Jul 16, 2019·1 cites·4 claims
- 4159US2024058927A1Impact toolMAKITA CORP·Filed 2023·Application pending·0 cites
- 4258US11491517B2Method and system for cleaning copper-exposed substrateORGANO CORP·Filed 2019·Granted Nov 8, 2022·0 cites·7 claims
- 4357US11228173B2Limiter circuitMITSUBISHI ELECTRIC CORP·Filed 2020·Granted Jan 18, 2022·0 cites·5 claims
- 4457US10857512B2Diluted solution production method and diluted solution production apparatusORGANO CORP·Filed 2019·Granted Dec 8, 2020·0 cites·7 claims
- 4557US7540737B2Apparatus for producing bottle-type synthetic resin containersYOSHINO KOGYOSHO CO LTD·Filed 2007·Granted Jun 2, 2009·0 cites·10 claims
- 4656US11336233B2AmplifierMITSUBISHI ELECTRIC CORP·Filed 2020·Granted May 17, 2022·0 cites·5 claims
- 4755US11381206B2Power amplifier and filterMITSUBISHI ELECTRIC CORP·Filed 2020·Granted Jul 5, 2022·0 cites·5 claims
- 4855US7306760B2Process and apparatus for producing bottle-shaped container made of synthetic resinYOSHINO KOGYOSHO CO LTD·Filed 2002·Granted Dec 11, 2007·2 cites·8 claims
- 4955US7078441B2Organic porous material, process for manufacturing the same, and organic porous ion exchangerORGANO CORP·Filed 2004·Granted Jul 18, 2006·1 cites·6 claims
- 5054US10434546B2Method and system for cleaning copper-exposed substrateORGANO CORP·Filed 2014·Granted Oct 8, 2019·0 cites·7 claims
Showing the top 50 of 93 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Koji Yamanaka files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →