Inventor · disambiguated record
Takafumi Yokoyama
Also filed as: YOKOYAMA TAKAFUMI
23 granted patents·8 pending applications·129 citations·filing 1996–2024
92Inventor score
Files withNIPPON STEEL CORP23NIPPON STEEL & SUMITOMO METAL CORP5NISSAN CHEMICAL IND LTD2YOKOYAMA TAKAFUMI1
Top patents by PatentIndex Score
31 records- 0195US11905570B2Hot dip galvanized steel sheet and method for producing sameNIPPON STEEL CORP·Filed 2020·Granted Feb 20, 2024·2 cites·1 claims
- 0295US11814708B2Hot dip galvanized steel sheet and method for producing sameNIPPON STEEL CORP·Filed 2020·Granted Nov 14, 2023·2 cites·2 claims
- 0391US10724114B2High-strength cold-rolled steel sheet, high-strength hot-dip galvanized steel sheet and high-strength galvannealed steel sheetNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted Jul 28, 2020·2 cites·9 claims
- 0490US11447848B2Steel sheet and manufacturing method of thereforNIPPON STEEL CORP·Filed 2018·Granted Sep 20, 2022·2 cites·10 claims
- 0590US11377710B2Steel sheet and manufacturing method thereforNIPPON STEEL CORP·Filed 2018·Granted Jul 5, 2022·2 cites·12 claims
- 0689US11332803B2High strength hot-dip galvanized steel sheet and production method thereforNIPPON STEEL CORP·Filed 2018·Granted May 17, 2022·2 cites·5 claims
- 0789US2024182997A1Hot dip galvanized steel sheet and method for producing sameNIPPON STEEL CORP·Filed 2024·Application pending·0 cites
- 0886US6025455AProcess of producing hydrophobic organosilica solNISSAN CHEMICAL IND LTD·Filed 1998·Granted Feb 15, 2000·62 cites·9 claims
- 0978US5902226AMethod of preparing a propanol sol of silicaNISSAN CHEMICAL IND LTD·Filed 1996·Granted May 11, 1999·53 cites·13 claims
- 1074US10351942B2Hot-dip galvannealed hot-rolled steel sheet and process for producing sameYOKOYAMA TAKAFUMI·Filed 2012·Granted Jul 16, 2019·2 cites·3 claims
- 1170US2025146095A1Steel sheet and method for manufacturing steel sheetNIPPON STEEL CORP·Filed 2023·Application pending·0 cites
- 1268US2024327962A1Hot dip galvanized steel sheet and method for producing sameNIPPON STEEL CORP·Filed 2022·Application pending·0 cites
- 1366US12098440B2Steel sheet and method for producing sameNIPPON STEEL CORP·Filed 2021·Granted Sep 24, 2024·0 cites·16 claims
- 1466US2024327965A1Steel sheet and method for producing sameNIPPON STEEL CORP·Filed 2022·Application pending·0 cites
- 1566US2024263288A1Cold rolled steel sheet and method for producing sameNIPPON STEEL CORP·Filed 2022·Application pending·0 cites
- 1663US2023304119A1Steel sheet and method for manufacturing sameNIPPON STEEL CORP·Filed 2021·Application pending·0 cites
- 1762US11970752B2Steel sheetNIPPON STEEL CORP·Filed 2020·Granted Apr 30, 2024·0 cites·2 claims
- 1861US11732321B2Steel sheet and method of producing sameNIPPON STEEL CORP·Filed 2020·Granted Aug 22, 2023·0 cites·4 claims
- 1960US11685963B2Zinc-plated steel sheet and manufacturing method thereofNIPPON STEEL CORP·Filed 2019·Granted Jun 27, 2023·0 cites·16 claims
- 2059US11859259B2Zinc-plated steel sheet and manufacturing method thereofNIPPON STEEL CORP·Filed 2019·Granted Jan 2, 2024·0 cites·17 claims
- 2158US12006562B2Hot dip galvanized steel sheet and method for producing sameNIPPON STEEL CORP·Filed 2020·Granted Jun 11, 2024·0 cites·3 claims
- 2257US12460285B2Steel sheetNIPPON STEEL CORP·Filed 2020·Granted Nov 4, 2025·0 cites·7 claims
- 2357US12305266B2High-strength steel plate having excellent formability, toughness and weldability, and production method of sameNIPPON STEEL CORP·Filed 2018·Granted May 20, 2025·0 cites·29 claims
- 2455US12281392B2Hot dip galvanized steel sheet and method for producing sameNIPPON STEEL CORP·Filed 2020·Granted Apr 22, 2025·0 cites·3 claims
- 2555US11885025B2High-strength steel sheet having excellent moldability and impact resistance, and method for manufacturing high-strength steel sheet having excellent moldability and impact resistanceNIPPON STEEL CORP·Filed 2018·Granted Jan 30, 2024·0 cites·17 claims
- 2653US11680303B2Steel sheet and manufacturing method thereforNIPPON STEEL CORP·Filed 2018·Granted Jun 20, 2023·0 cites·10 claims
- 2752US11326234B2Cold-rolled steel sheet and hot-dip galvanized cold-rolled steel sheetNIPPON STEEL CORP·Filed 2017·Granted May 10, 2022·0 cites·7 claims
- 2847US11174529B2High-strength steel sheet and method of manufacturing the sameNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted Nov 16, 2021·0 cites·17 claims
- 2943US2018209007A1High strength hot rolled steel sheetNIPPON STEEL & SUMITOMO METAL CORP·Filed 2015·Application pending·0 cites
- 3043US2018100213A1Hot-rolled steel sheet and method for producing the sameNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Application pending·0 cites
- 3136US10718044B2Hot-dip galvanized steel sheetNIPPON STEEL & SUMITOMO METAL CORP·Filed 2016·Granted Jul 21, 2020·0 cites·7 claims
Join the waitlist — get patent alerts
Get an alert when Takafumi Yokoyama 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 →