Inventor · disambiguated record
Hirotake Izawa
Also filed as: IZAWA HIROTAKE
13 granted patents·1 pending application·61 citations·filing 2007–2022
89Inventor score
Technology areasB43K
Top patents by PatentIndex Score
14 records- 0191US7802936B1Mechanical pencilMITSUBISHI PENCIL CO·Filed 2008·Granted Sep 28, 2010·16 cites·7 claims
- 0288US7654763B2Mechanical pencilMITSUBISHI PENCIL CO·Filed 2007·Granted Feb 2, 2010·10 cites·12 claims
- 0384US7815385B2Mechanical pencilMITSUBISHI PENCIL CO·Filed 2009·Granted Oct 19, 2010·7 cites·4 claims
- 0476US8337107B2Mechanical pencilOHSAWA NORIO·Filed 2008·Granted Dec 25, 2012·8 cites·12 claims
- 0575US7850381B2Mechanical pencilMITSUBISHI PENCIL CO·Filed 2008·Granted Dec 14, 2010·5 cites·6 claims
- 0675US7850380B2Mechanical pencilMITSUBISHI PENCIL CO·Filed 2008·Granted Dec 14, 2010·5 cites·6 claims
- 0774US8328446B2Mechanical pencilIZAWA HIROTAKE·Filed 2010·Granted Dec 11, 2012·2 cites·3 claims
- 0874US7806615B1Mechanical pencilMITSUBISHI PENCIL CO·Filed 2008·Granted Oct 5, 2010·5 cites·6 claims
- 0971US9302529B2Mechanical pencilIZAWA HIROTAKE·Filed 2012·Granted Apr 5, 2016·2 cites·12 claims
- 1065US12187068B2Fiber-bundled part for writing instruments, and pen tip and writing instrument using the fiber-bundled partMITSUBISHI PENCIL CO·Filed 2021·Granted Jan 7, 2025·0 cites·7 claims
- 1165US9358828B2Mechanical pencilMITSUBISHI PENCIL CO·Filed 2013·Granted Jun 7, 2016·1 cites·5 claims
- 1260US12227024B2Writing implementMITSUBISHI PENCIL CO·Filed 2022·Granted Feb 18, 2025·0 cites·8 claims
- 1348US2022324250A1Writing implementMITSUBISHI PENCIL CO·Filed 2020·Application pending·0 cites
- 1445US9669649B2Mechanical pencilMITSUBISHI PENCIL CO·Filed 2013·Granted Jun 6, 2017·0 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →