Inventor · disambiguated record
Shinji Tsujio
Also filed as: TSUJIO SHINJI
7 granted patents·1 pending application·135 citations·filing 1978–2018
86Inventor score
Top patents by PatentIndex Score
8 records- 0190US6458192B1Erasable ink compositionSAKURA COLOR PROD CORP·Filed 2000·Granted Oct 1, 2002·42 cites·6 claims
- 0284US6306930B1Erasable ink and water-base ballpoint pen using sameSAKURA COLOR PROD CORP·Filed 1999·Granted Oct 23, 2001·42 cites·10 claims
- 0371US4209332AMethod for manufacturing pencil leadsSAKURA COLOR PROD CORP·Filed 1978·Granted Jun 24, 1980·22 cites·16 claims
- 0456US6203910B1CrayonSAKURA COLOR PROD CORP·Filed 1997·Granted Mar 20, 2001·16 cites·6 claims
- 0553US6706782B2Erasable ink and water-base ballpoint pen using sameSAKURA COLOR PROD CORP·Filed 2001·Granted Mar 16, 2004·2 cites·10 claims
- 0653US2020369869A1EraserSAKURA COLOR PROD CORP·Filed 2018·Application pending·0 cites
- 0748US6074465AFluorescent crayonSAKURA COLOR PROD CORP·Filed 1998·Granted Jun 13, 2000·11 cites·5 claims
- 0841US9079450B2Plastic eraser, plastic eraser composite body, and method for producing thereofTSUJIO SHINJI·Filed 2012·Granted Jul 14, 2015·0 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →