Inventor · disambiguated record
Takamasa Sakai
Also filed as: SAKAI TAKAMASA
29 granted patents·12 pending applications·625 citations·filing 1980–2024
97Inventor score
Files withDAINIPPON SCREEN MFG16CLARION CO LTD10UNIV TOKYO10HAYASHI SHINTAROU1MATSUSHITA ELECTRIC INDUSTRIAL CO LTD1
Top patents by PatentIndex Score
41 records- 0194US4746857AProbing apparatus for measuring electrical characteristics of semiconductor device formed on waferDAINIPPON SCREEN MFG·Filed 1986·Granted May 24, 1988·108 cites·11 claims
- 0285US6598805B2Substrate cleaning apparatusDAINIPPON SCREEN MFG·Filed 2002·Granted Jul 29, 2003·33 cites·11 claims
- 0384US5233291AMethod of and apparatus for measuring electric characteristics of semiconductor waferDAINIPPON SCREEN MFG·Filed 1991·Granted Aug 3, 1993·59 cites·27 claims
- 0481US4798926AMethod of heating semiconductor and susceptor used thereforDAINIPPON SCREEN MFG·Filed 1987·Granted Jan 17, 1989·37 cites·6 claims
- 0579US4693208AFeeder of oxygen gas containing steamDAINIPPON SCREEN MFG·Filed 1986·Granted Sep 15, 1987·26 cites·7 claims
- 0677US2024197964A1Gel material for ophthalmic treatment useUNIV TOKYO·Filed 2024·Application pending·0 cites
- 0776US7539097B2Optical disk devicePANASONIC CORP·Filed 2005·Granted May 26, 2009·3 cites·19 claims
- 0875US5857474AMethod of and apparatus for washing a substrateDAINIPPON SCREEN MFG·Filed 1996·Granted Jan 12, 1999·45 cites·20 claims
- 0972US4630082ASemiconductor device with multi-electrode construction equivalent to variable capacitance diodeCLARION CO LTD·Filed 1986·Granted Dec 16, 1986·30 cites·1 claims
- 1071US12227642B2Polymer gel having sponge-like porous structureUNIV TOKYO·Filed 2019·Granted Feb 18, 2025·0 cites·20 claims
- 1171US4365216ASurface-acoustic-wave deviceCLARION CO LTD·Filed 1981·Granted Dec 21, 1982·14 cites·11 claims
- 1270US4803948AHeat processing apparatus for semiconductor manufacturingDAINIPPON SCREEN MFG·Filed 1987·Granted Feb 14, 1989·38 cites·5 claims
- 1370US4456917AVariable capacitorCLARION CO LTD·Filed 1981·Granted Jun 26, 1984·22 cites·9 claims
- 1469US5239183AOptical gap measuring device using frustrated internal reflectionDAINIPPON SCREEN MFG·Filed 1992·Granted Aug 24, 1993·28 cites·14 claims
- 1569US2024294746A1Polymer material with phase-separated structureUNIV TOKYO·Filed 2023·Application pending·0 cites
- 1669US2024279403A1Polymer material with phase-separated structure obtained by controlling the number of branchesUNIV TOKYO·Filed 2023·Application pending·0 cites
- 1766US7869062B2Apparatus for supporting substrate, apparatus for measuring surface potential, apparatus for measuring film thickness, and apparatus for inspecting substrateDAINIPPON SCREEN MFG·Filed 2008·Granted Jan 11, 2011·2 cites·25 claims
- 1866US4883424AApparatus for heat treating substratesDAINIPPON SCREEN MFG·Filed 1988·Granted Nov 28, 1989·20 cites·8 claims
- 1966US2024270911A1Method for producing hydrogel having porous structureUNIV TOKYO·Filed 2023·Application pending·0 cites
- 2065US5225690AGap measuring device and method using frustrated internal reflectionDAINIPPON SCREEN MFG·Filed 1991·Granted Jul 6, 1993·25 cites·58 claims
- 2164US4849608AApparatus for heat-treating wafersDAINIPPON SCREEN MFG·Filed 1988·Granted Jul 18, 1989·31 cites·23 claims
- 2262US7073521B2Substrate processing apparatus comprising ring-shaped motorDAINIPPON SCREEN MFG·Filed 2002·Granted Jul 11, 2006·8 cites·18 claims
- 2359US4529994AVariable capacitor with single depletion layerCLARION CO LTD·Filed 1981·Granted Jul 16, 1985·14 cites·7 claims
- 2458US2023218797A1Hemostatic polymer material kitUNIV TOKYO·Filed 2021·Application pending·0 cites
- 2557US4357553ASurface-acoustic-wave deviceCLARION CO LTD·Filed 1980·Granted Nov 2, 1982·9 cites·17 claims
- 2656US4412906ASputtering apparatusCLARION CO LTD·Filed 1981·Granted Nov 1, 1983·19 cites·3 claims
- 2756US2023330304A1Gel material for treating tendon or ligamentUNIV TOKYO·Filed 2021·Application pending·0 cites
- 2854US2019015559A1Gel material for ophthalmic treatment useUNIV TOKYO·Filed 2016·Application pending·0 cites
- 2953US10550225B2Process for producing low-concentration gel using gel-precursor clusters, and gel obtained by said production processUNIV TOKYO·Filed 2016·Granted Feb 4, 2020·0 cites·23 claims
- 3053US4449141AVariable capacitorCLARION CO LTD·Filed 1981·Granted May 15, 1984·11 cites·19 claims
- 3153US2023293778A1Gel material for regenerative medicineUNIV TOKYO·Filed 2021·Application pending·0 cites
- 3251US2012122949A1Ultra-high strength injectable hydrogel and process for producing the sameTEI YUICHI·Filed 2009·Application pending·0 cites
- 3350US5554939ANon-destructive measuring sensor for semiconductor wafer and method of manufacturing the sameDAINIPPON SCREEN MFG·Filed 1993·Granted Sep 10, 1996·14 cites·12 claims
- 3449US4529995AVariable capacitance deviceCLARION CO LTD·Filed 1982·Granted Jul 16, 1985·10 cites·2 claims
- 3545US2020299638A1Liquid set for droplet discharging apparatusSHIONOIRI MOMOKO·Filed 2020·Application pending·0 cites
- 3643US2012133042A1Mounting structure of chip and module using the sameHAYASHI SHINTAROU·Filed 2009·Application pending·0 cites
- 3742US5444389AMethod and apparatus for measuring lifetime of minority carriers in semiconductorDAINIPPON SCREEN MFG·Filed 1993·Granted Aug 22, 1995·9 cites·14 claims
- 3842US2006191556A1Substrate processing apparatus and substrate processing methodDAINIPPON SCREEN MFG·Filed 2006·Application pending·0 cites
- 3940US7190643B2Land pre-pit address demodulating deviceMATSUSHITA ELECTRIC INDUSTRIAL CO LTD·Filed 2004·Granted Mar 13, 2007·0 cites·10 claims
- 4039US4473767ASurface acoustic wave convolver with depletion layer controlCLARION CO LTD·Filed 1982·Granted Sep 25, 1984·5 cites·3 claims
- 4138US4466876AThin layer depositing apparatusCLARION CO LTD·Filed 1982·Granted Aug 21, 1984·5 cites·14 claims
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