Inventor · disambiguated record
Youichi Nakazato
Also filed as: NAKAZATO YOUICHI
13 granted patents·174 citations·filing 1988–1994
93Inventor score
Technology areasB43K
Top patents by PatentIndex Score
13 records- 0182US5022774AWriting tool with eraser dispenserKOTOBUKI & CO LTD·Filed 1988·Granted Jun 11, 1991·24 cites·3 claims
- 0281US5370471AWriting tool, with eraser dispenserKOTOBUKI & CO LTD·Filed 1992·Granted Dec 6, 1994·30 cites·14 claims
- 0369US5683191AWriting toolKOTOBUKI & CO LTD·Filed 1994·Granted Nov 4, 1997·17 cites·4 claims
- 0464US5062727AWriting toolKOTOBUKI & CO LTD·Filed 1988·Granted Nov 5, 1991·12 cites·4 claims
- 0556US5207522AKnock type mechanical pencil with retractable eraserKOTOBUKI & CO LTD·Filed 1991·Granted May 4, 1993·10 cites·3 claims
- 0656US5074694ALatch mechanism for retractable writing instrumentsKOTOBUKI & CO LTD·Filed 1990·Granted Dec 24, 1991·17 cites·4 claims
- 0755US4973179AClip actuated latch mechanism for retractable writing instrumentsKOTOBUKI & CO LTD·Filed 1989·Granted Nov 27, 1990·13 cites·4 claims
- 0852US4955739AMechanical pencil having side push button actuated lead advanceKOTOBUKI & CO LTD·Filed 1988·Granted Sep 11, 1990·13 cites·4 claims
- 0949US5018891AWriting instrument with eraser dispenserKOTOBUKO & CO LTD·Filed 1989·Granted May 28, 1991·13 cites·3 claims
- 1048US5236270AWriting tool for advancing lead with eraser dispenserKOTOBUKI & CO LTD·Filed 1992·Granted Aug 17, 1993·7 cites·3 claims
- 1142US5090831AWriting instrumentKOTOBUKI & CO LTD·Filed 1990·Granted Feb 25, 1992·9 cites·2 claims
- 1239US5700101AWriting toolKOTOBUKI & CO LTD·Filed 1994·Granted Dec 23, 1997·4 cites·3 claims
- 1337US4957384AMechanical pencilKOTOBUKI & CO LTD·Filed 1989·Granted Sep 18, 1990·5 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →