Inventor · disambiguated record
Hidehei Kageyama
Also filed as: KAGEYAMA HIDEHEI · KAGEYAMA TOSHIHIKO
105 granted patents·6 pending applications·985 citations·filing 1977–2023
99Inventor score
Files withKOTOBUKI & CO LTD94KAGEYAMA HIDEHEI6KOTOBUKI PRINTING CO LTD4MITSUBISHI PENCIL CO2COSMOPAK INTERNAT LTD1
Top patents by PatentIndex Score
111 records- 0198US6227739B1Liquid containerKOTOBUKI & CO LTD·Filed 2000·Granted May 8, 2001·64 cites·15 claims
- 0292US8970560B2Writing instrumentKOTOBUKI & CO LTD·Filed 2013·Granted Mar 3, 2015·8 cites·20 claims
- 0387US7051642B2Liquid containerKOTOBUKI PRINTING CO LTD·Filed 2004·Granted May 30, 2006·30 cites·7 claims
- 0486US5997200ABarrel with finger gripping meansKOTOBUKI & CO LTD·Filed 1999·Granted Dec 7, 1999·28 cites·8 claims
- 0585US4200977ACutter knifeKOTOBUKI & CO LTD·Filed 1978·Granted May 6, 1980·47 cites·5 claims
- 0684US11390109B2Mechanical pencilKOTOBUKI & CO LTD·Filed 2019·Granted Jul 19, 2022·2 cites·10 claims
- 0783US5988908ABarrel with finger gripping meansKOTOBUKI & CO LTD·Filed 1996·Granted Nov 23, 1999·27 cites·8 claims
- 0882US7284927B2Writing instrument including stick-shaped material propelling mechanismKOTOBUKI & CO LTD·Filed 2005·Granted Oct 23, 2007·8 cites·13 claims
- 0982US6702158B2Knocking-type liquid containerKOTOBUKI & CO LTD·Filed 2001·Granted Mar 9, 2004·23 cites·20 claims
- 1081US6749354B2Composite writing implementKOTOBUKI & CO LTD·Filed 2002·Granted Jun 15, 2004·18 cites·2 claims
- 1178US4365390AClip for writing utensilKOTOBUKI & CO LTD·Filed 1980·Granted Dec 28, 1982·29 cites·2 claims
- 1277US10343446B2Writing instrumentKOTOBUKI & CO LTD·Filed 2018·Granted Jul 9, 2019·1 cites·14 claims
- 1376US11090969B2Mechanical pencilKOTOBUKI & CO LTD·Filed 2019·Granted Aug 17, 2021·1 cites·17 claims
- 1476US6994484B2Composite writing toolKOTOBUKI & CO LTD·Filed 2005·Granted Feb 7, 2006·6 cites·12 claims
- 1575US9862225B2Liquid applying toolKOTOBUKI & CO LTD·Filed 2014·Granted Jan 9, 2018·3 cites·7 claims
- 1674US8740489B2Liquid applicatorKAGEYAMA HIDEHEI·Filed 2008·Granted Jun 3, 2014·7 cites·8 claims
- 1774US8434957B2Knock-type writing instrumentKAGEYAMA HIDEHEI·Filed 2009·Granted May 7, 2013·5 cites·6 claims
- 1874US7878726B2Stick-shaped material propelling containerKOTOBUKI & CO LTD·Filed 2006·Granted Feb 1, 2011·3 cites·8 claims
- 1974US7018124B1Writing implement with stylusKOTOBUKI & CO LTD·Filed 2004·Granted Mar 28, 2006·13 cites·1 claims
- 2074US6390707B2Knocking writing utensilKOTOBUKI & CO LTD·Filed 2000·Granted May 21, 2002·11 cites·18 claims
- 2172US9114922B2Knock-type propelling containerKAGEYAMA HIDEHEI·Filed 2011·Granted Aug 25, 2015·3 cites·9 claims
- 2272US9067233B2Stick-shaped material propelling containerKOTOBUKI & CO LTD·Filed 2014·Granted Jun 30, 2015·2 cites·12 claims
- 2372US4618280APush-button writing instrument with front seal meansTOYO POLYMER KK·Filed 1984·Granted Oct 21, 1986·23 cites·4 claims
- 2471US6893179B2Rotary bar-projecting mechanism for push-button implementKOTOBUKI & CO LTD·Filed 2003·Granted May 17, 2005·12 cites·9 claims
- 2571US5702193ASide knock type mechanical pencilKOTOBUKI & CO LTD·Filed 1996·Granted Dec 30, 1997·14 cites·12 claims
- 2669US7137527B2ContainerKOTOBUKI & CO LTD·Filed 2003·Granted Nov 21, 2006·1 cites·15 claims
- 2768US12090777B2Writing instrument refills and writing instrumentKOTOBUKI & CO LTD·Filed 2023·Granted Sep 17, 2024·0 cites·14 claims
- 2868US5971644ASide knock-type writing instrumentKOTOBUKI & CO LTD·Filed 1998·Granted Oct 26, 1999·19 cites·15 claims
- 2968US5009533APropelling pencil with cushion sleeveKOTOBUKI & CO LTD·Filed 1990·Granted Apr 23, 1991·27 cites·5 claims
- 3067US4386865AAutomatic sharp pencilKOTOBUKI & CO LTD·Filed 1980·Granted Jun 7, 1983·20 cites·8 claims
- 3166US7607203B2Clip ornament for a barrel, clip with an ornament and method for attaching an ornament to a clipKOTOBUKI & CO LTD·Filed 2006·Granted Oct 27, 2009·4 cites·5 claims
- 3266US2021162797A1Writing instrument and method for manufacturing writing instrumentKOTOBUKI & CO LTD·Filed 2021·Application pending·0 cites
- 3365US7922411B2End plug mounting structure for writing instrumentKOTOBUKI & CO LTD·Filed 2007·Granted Apr 12, 2011·1 cites·9 claims
- 3465US7210869B2Cartridge type stationery productKOTOBUKI & CO LTD·Filed 2004·Granted May 1, 2007·8 cites·18 claims
- 3565US6309129B1Writing utensilsKOTOBUKI & CO LTD·Filed 1999·Granted Oct 30, 2001·14 cites·4 claims
- 3665US2020361230A1Writing instrument and method for manufacturing writing instrumentKOTOBUKI & CO LTD·Filed 2019·Application pending·0 cites
- 3763US4895467ARotary knock type mechanical pencilKOTOBUKI & CO LTD·Filed 1987·Granted Jan 23, 1990·17 cites·8 claims
- 3862US11065907B2Hand tools, cosmetic devices and writing instrumentsKOTOBUKI & CO LTD·Filed 2019·Granted Jul 20, 2021·0 cites·16 claims
- 3962US8484808B2Clip attachment structure for a writing instrumentKAGEYAMA HIDEHEI·Filed 2008·Granted Jul 16, 2013·3 cites·4 claims
- 4062US5988913ADouble-chuck mechanical pencilKOTOBUKI & CO LTD·Filed 1997·Granted Nov 23, 1999·12 cites·6 claims
- 4161US6517272B1Double-chuck mechanical pencilKOTOBUKI & CO LTD·Filed 1999·Granted Feb 11, 2003·11 cites·4 claims
- 4260US6382859B2Double chuck type mechanical pencil and internal writing mechanism thereofKOTOBUKI & CO LTD·Filed 2001·Granted May 7, 2002·6 cites·3 claims
- 4360US6325130B1Coat transfer toolKOTOBUKI & CO LTD·Filed 1999·Granted Dec 4, 2001·15 cites·20 claims
- 4460US4171170AAutomatic pencilKOTOBUKI & CO LTD·Filed 1977·Granted Oct 16, 1979·14 cites·4 claims
- 4559US6039484AWriting instrumentKOTOBUKI & CO LTD·Filed 1998·Granted Mar 21, 2000·14 cites·28 claims
- 4658US5022772ARotary knock type mechanical pencilKOTOBUKI & CO LTD·Filed 1989·Granted Jun 11, 1991·14 cites·7 claims
- 4758US4669904AWriting instrument with weight actuationKOTOBUKI & CO LTD·Filed 1985·Granted Jun 2, 1987·16 cites·6 claims
- 4858US4619539AMechanical pencil equipped with lead-storing cartridgeKOTOBUKI & CO LTD·Filed 1984·Granted Oct 28, 1986·14 cites·2 claims
- 4957US6447193B1Writing utensilsKOTOBUKI & CO LTD·Filed 2000·Granted Sep 10, 2002·4 cites·7 claims
- 5056US8444336B2Lead cartridge and mechanical pencil with built-in lead cartridgeKAGEYAMA HIDEHEI·Filed 2008·Granted May 21, 2013·0 cites·19 claims
Showing the top 50 of 111 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →