Inventor · disambiguated record
Yasuaki Koiwa
Also filed as: KOIWA YASUAKI
36 granted patents·4 pending applications·379 citations·filing 2003–2023
97Inventor score
Files withSENJU SPRINKLER CO LTD31KOIWA YASUAKI6KATO RIKIYA1KIKUCHI TETSURO1SENJU SPRINKLER COMPANY LTD1
Top patents by PatentIndex Score
40 records- 0196US9630039B2Sprinkler headKOIWA YASUAKI·Filed 2011·Granted Apr 25, 2017·26 cites·18 claims
- 0296US9320929B2Protective cap of sprinkler head and sprinkler headSENJU SPRINKLER CO LTD·Filed 2014·Granted Apr 26, 2016·25 cites·6 claims
- 0396US6840329B2Cover assembly for a concealed sprinkler headSENJU SPRINKLER COMPANY LTD·Filed 2003·Granted Jan 11, 2005·87 cites·17 claims
- 0493US9463343B2Protecting cap and sprinkler headSENJU SPRINKLER CO LTD·Filed 2013·Granted Oct 11, 2016·19 cites·20 claims
- 0593US9339675B2Sprinkler headKOIWA YASUAKI·Filed 2010·Granted May 17, 2016·21 cites·20 claims
- 0690US11160999B2Protector for heat-sensitive element of sprinkler headSENJU SPRINKLER CO LTD·Filed 2018·Granted Nov 2, 2021·6 cites·10 claims
- 0785US7543654B2Sprinkler head cover and a sprinkler headSENJU SPRINKLER CO LTD·Filed 2005·Granted Jun 9, 2009·17 cites·5 claims
- 0884US11324980B2Sprinkler headSENJU SPRINKLER CO LTD·Filed 2018·Granted May 10, 2022·3 cites·11 claims
- 0984US8844554B2Valve mechanism opened in response to extremely high temperatureKIKUCHI TETSURO·Filed 2009·Granted Sep 30, 2014·14 cites·4 claims
- 1082USD1000585SProtective cap for sprinkler headSENJU SPRINKLER CO LTD·Filed 2022·Granted Oct 3, 2023·7 cites·1 claims
- 1175USD781399SSprinkler head bodySENJU SPRINKLER CO LTD·Filed 2015·Granted Mar 14, 2017·16 cites·1 claims
- 1274USD799924SWrench for sprinkler headSENJU SPRINKLER CO LTD·Filed 2016·Granted Oct 17, 2017·15 cites·1 claims
- 1374USD721419SSprinkler head protective capSENJU SPRINKLER CO LTD·Filed 2013·Granted Jan 20, 2015·18 cites·1 claims
- 1474USD603479SSprinkler headSENJU SPRINKLER CO LTD·Filed 2009·Granted Nov 3, 2009·19 cites·1 claims
- 1573US11511144B2Sprinkler headSENJU SPRINKLER CO LTD·Filed 2019·Granted Nov 29, 2022·1 cites·14 claims
- 1673USD961727SSprinkler head accessorySENJU SPRINKLER CO LTD·Filed 2020·Granted Aug 23, 2022·5 cites·1 claims
- 1771USD1083030SDeflector for sprinkler headSENJU SPRINKLER CO LTD·Filed 2023·Granted Jul 8, 2025·3 cites·1 claims
- 1866USD663009SSprinkler cover plate assemblyKOIWA YASUAKI·Filed 2011·Granted Jul 3, 2012·14 cites·1 claims
- 1965USD895416SSpring for sprinkler headSENJU SPRINKLER CO LTD·Filed 2018·Granted Sep 8, 2020·9 cites·1 claims
- 2063USD683425SSprinkler protective capKOIWA YASUAKI·Filed 2012·Granted May 28, 2013·12 cites·1 claims
- 2162USD721418SSprinkler head protective capSENJU SPRINKLER CO LTD·Filed 2013·Granted Jan 20, 2015·11 cites·1 claims
- 2261US11642557B2Sprinkler head accessorySENJU SPRINKLER CO LTD·Filed 2021·Granted May 9, 2023·0 cites·15 claims
- 2360US2024408634A1Accessory for sidewall sprinkler headSENJU SPRINKLER CO LTD·Filed 2022·Application pending·0 cites
- 2454USD638913SSprinkler head bodySENJU SPRINKLER CO LTD·Filed 2010·Granted May 31, 2011·8 cites·1 claims
- 2550US11383114B2Sprinkler headSENJU SPRINKLER CO LTD·Filed 2017·Granted Jul 12, 2022·0 cites·19 claims
- 2648USD963110SSprinkler head accessorySENJU SPRINKLER CO LTD·Filed 2020·Granted Sep 6, 2022·1 cites·1 claims
- 2748USD673825SSprinkler cover plate assembly installation toolSENJU SPRINKLER CO LTD·Filed 2012·Granted Jan 8, 2013·6 cites·1 claims
- 2848US2021094051A1Sprinkler HeadSENJU SPRINKLER CO LTD·Filed 2018·Application pending·0 cites
- 2947USD598068SHeat collector assembly for sprinkler headSENJU SPRINKLER CO LTD·Filed 2008·Granted Aug 11, 2009·6 cites·1 claims
- 3047US2008115948A1Sprinkler HeadKOIWA YASUAKI·Filed 2005·Application pending·0 cites
- 3145US10036479B2Alloy for a fusible plug and a fusible plugKATO RIKIYA·Filed 2005·Granted Jul 31, 2018·0 cites·14 claims
- 3243US2015013131A1Sprinkler Head Accessory Mounting ToolSENJU SPRINKLER CO LTD·Filed 2013·Application pending·0 cites
- 3340USD673826SSprinkler protective cap removal toolSENJU SPRINKLER CO LTD·Filed 2012·Granted Jan 8, 2013·3 cites·1 claims
- 3439USD887800SSpanner wrenchSENJU SPRINKLER CO LTD·Filed 2018·Granted Jun 23, 2020·2 cites·1 claims
- 3539USD683426SSprinkler cover plate assemblyKOIWA YASUAKI·Filed 2012·Granted May 28, 2013·3 cites·1 claims
- 3637USD1091762SDeflector for sprinkler headSENJU SPRINKLER CO LTD·Filed 2023·Granted Sep 2, 2025·0 cites·1 claims
- 3737USD1029599SWrench socket for sprinkler headSENJU SPRINKLER CO LTD·Filed 2022·Granted Jun 4, 2024·0 cites·1 claims
- 3835USD892269SProtector for sprinkler headSENJU SPRINKLER CO LTD·Filed 2018·Granted Aug 4, 2020·1 cites·1 claims
- 3933USD964517SSprinkler head accessorySENJU SPRINKLER CO LTD·Filed 2020·Granted Sep 20, 2022·0 cites·1 claims
- 4033USD887527SWrench socket for sprinkler headSENJU SPRINKLER CO LTD·Filed 2018·Granted Jun 16, 2020·1 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →