Inventor · disambiguated record
Tooru Nakajima
Also filed as: NAKAJIMA TOORU
15 granted patents·92 citations·filing 1986–2018
91Inventor score
Files withMITSUBISHI PENCIL CO7HITACHI IND EQUIPMENT SYS2BESTEX KK1HITACHI IND EQUUIPMENT SYSTEMS1HITACHI LTD1
Top patents by PatentIndex Score
15 records- 0190US10336129B2Writing implementMITSUBISHI PENCIL CO·Filed 2015·Granted Jul 2, 2019·4 cites·4 claims
- 0287US9889701B2Writing implementMITSUBISHI PENCIL CO·Filed 2015·Granted Feb 13, 2018·3 cites·4 claims
- 0382USD293317SDigital telephone and data exchange equipment cabinetNEC CORP·Filed 1986·Granted Dec 22, 1987·27 cites·1 claims
- 0475US5143752AFiltering material of apatite and glucan used for surgical masks and method of making itBESTEX KK·Filed 1992·Granted Sep 1, 1992·33 cites·5 claims
- 0573US9636940B2Writing instrumentMITSUBISHI PENCIL CO·Filed 2013·Granted May 2, 2017·2 cites·2 claims
- 0669US8944716B2Valved applicatorSAWA YUKINORI·Filed 2010·Granted Feb 3, 2015·3 cites·5 claims
- 0767US7394668B2Switching power supply circuit and frequency converterHITACHI IND EQUIPMENT SYS·Filed 2006·Granted Jul 1, 2008·7 cites·16 claims
- 0863US6873240B2Power converterHITACHI LTD·Filed 2002·Granted Mar 29, 2005·7 cites·4 claims
- 0955US10507684B2Writing instrumentMITSUBISHI PENCIL CO·Filed 2016·Granted Dec 17, 2019·0 cites·7 claims
- 1049US11472221B2Writing implementMITSUBISHI PENCIL CO·Filed 2018·Granted Oct 18, 2022·0 cites·11 claims
- 1149US11207913B2Erasing member and erasing tool using the sameMITSUBISHI PENCIL CO·Filed 2013·Granted Dec 28, 2021·0 cites·6 claims
- 1242US10576774B2Ballpoint penMITSUBISHI PENCIL CO·Filed 2016·Granted Mar 3, 2020·0 cites·7 claims
- 1341US7151680B2Switching power supply circuit and frequency converterHITACHI IND EQUIPMENT SYS·Filed 2003·Granted Dec 19, 2006·3 cites·19 claims
- 1439US6927665B2Power converterHITACHI IND EQUUIPMENT SYSTEMS·Filed 2004·Granted Aug 9, 2005·1 cites·4 claims
- 1528US5353379AInformation reproducing apparatus and game machine including the samePIONEER ELECTRONIC CORP·Filed 1993·Granted Oct 4, 1994·2 cites·12 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →