Inventor · disambiguated record
Shigeo Oka
Also filed as: OKA SHIGEO
41 granted patents·923 citations·filing 1978–2008
98Inventor score
Technology areasB43K
Files withPENTEL KK37PENTEL KABUSHI KAISHA1PENTEL KABUSHIKI KAISKA1PENTEL KABUSHIKI KAUSHA1PENTEL KK D B A PENTEL CO LTD1
Top patents by PatentIndex Score
41 records- 0199USD259792SMarking pen or similar articlePENTEL KK·Filed 1978·Granted Jul 7, 1981·71 cites·1 claims
- 0297USD314978SWriting instrumentPENTEL KK·Filed 1987·Granted Feb 26, 1991·61 cites·1 claims
- 0397USD258219SAutomatic pencil or similar articlePENTEL KK·Filed 1979·Granted Feb 10, 1981·52 cites·1 claims
- 0496USD499139SBall point penPENTEL KK·Filed 2003·Granted Nov 30, 2004·72 cites·1 claims
- 0593USD421625SBall point penPENTEL KK·Filed 1999·Granted Mar 14, 2000·46 cites·1 claims
- 0693USD312837SWriting instrumentPENTEL KK·Filed 1987·Granted Dec 11, 1990·37 cites·1 claims
- 0791USD279993SMechanical pencil or similar articlePENTEL KK·Filed 1983·Granted Aug 6, 1985·28 cites·1 claims
- 0890USD305551SPen cap or similar articlePENTEL KK·Filed 1987·Granted Jan 16, 1990·29 cites·1 claims
- 0989US5558452AHolder tube for writing instrumentPENTEL KK·Filed 1993·Granted Sep 24, 1996·64 cites·31 claims
- 1089USD338038SBall point penPENTEL KK·Filed 1992·Granted Aug 3, 1993·51 cites·1 claims
- 1189USD263318SPen or similar articlePENTEL KK·Filed 1980·Granted Mar 9, 1982·25 cites·1 claims
- 1288USD351417SCap for a writing instrumentPENTEL KK·Filed 1992·Granted Oct 11, 1994·30 cites·1 claims
- 1388USD258218SBall point pen or similar articlePENTEL KK·Filed 1979·Granted Feb 10, 1981·20 cites·1 claims
- 1487USD428441SCorrection penPENTEL KK·Filed 1999·Granted Jul 18, 2000·32 cites·1 claims
- 1585USD266856SPen cap or similar articlePENTEL KK D B A PENTEL CO LTD·Filed 1980·Granted Nov 9, 1982·22 cites·1 claims
- 1681USD458966SBallpoint pen capPENTEL KK·Filed 2001·Granted Jun 18, 2002·26 cites·1 claims
- 1781USD357700SHousing for a ballpoint pen tipPENTEL KK·Filed 1988·Granted Apr 25, 1995·19 cites·1 claims
- 1880USD363310SShaft for a writing instrumentPENTEL KK·Filed 1994·Granted Oct 17, 1995·20 cites·1 claims
- 1971USD584357SCap for a writing instrumentPENTEL KK·Filed 2007·Granted Jan 6, 2009·17 cites·1 claims
- 2071USD390873SBall point penPENTEL KK·Filed 1996·Granted Feb 17, 1998·16 cites·1 claims
- 2170USD460486SCap for a writing instrumentPENTEL KK·Filed 2001·Granted Jul 16, 2002·16 cites·1 claims
- 2268USD458965SBall point penPENTEL KK·Filed 2000·Granted Jun 18, 2002·15 cites·1 claims
- 2366USD455179SClip for a writing instrumentPENTEL KK·Filed 2001·Granted Apr 2, 2002·14 cites·1 claims
- 2466USD351416SBall point penPENTEL KK·Filed 1993·Granted Oct 11, 1994·15 cites·1 claims
- 2566USD258220SClip for a writing instrument or the likePENTEL KK·Filed 1979·Granted Feb 10, 1981·8 cites·1 claims
- 2665USD312659SWriting instrumentPENTEL KK·Filed 1987·Granted Dec 4, 1990·10 cites·1 claims
- 2762USD460114SCap for a writing instrumentPENTEL KK·Filed 2001·Granted Jul 9, 2002·12 cites·1 claims
- 2860USD459757SCap for a writing instrumentPENTEL KK·Filed 2001·Granted Jul 2, 2002·11 cites·1 claims
- 2956USD449073SCase for refillable leads for a mechanical pencilPENTEL KK·Filed 1999·Granted Oct 9, 2001·9 cites·1 claims
- 3056USD256926SPen cap or similar articlePENTEL KK·Filed 1978·Granted Sep 16, 1980·5 cites·1 claims
- 3155USD492722SMarking penPENTEL KABUSHI KAISHA·Filed 2003·Granted Jul 6, 2004·10 cites·1 claims
- 3252US4902151AWriting instrument with plural elementsPENTEL KK·Filed 1988·Granted Feb 20, 1990·15 cites·10 claims
- 3351USD456844SCorrection penPENTEL KK·Filed 2000·Granted May 7, 2002·7 cites·1 claims
- 3449USD308697SWriting instrument clipPENTEL KK·Filed 1985·Granted Jun 19, 1990·5 cites·1 claims
- 3548USD572756SMechanical pencilPENTEL KK·Filed 2007·Granted Jul 8, 2008·6 cites·1 claims
- 3647USD547801SMarking penPENTEL KK·Filed 2005·Granted Jul 31, 2007·6 cites·1 claims
- 3745US6179124B1Container for lead refillPENTEL KK·Filed 1999·Granted Jan 30, 2001·7 cites·7 claims
- 3842USD594060SBallpoint penPENTEL KABUSHIKI KAISKA·Filed 2008·Granted Jun 9, 2009·6 cites·1 claims
- 3936USD490105SBall point penPENTEL KK·Filed 2002·Granted May 18, 2004·2 cites·1 claims
- 4035USD593606SBallpoint penPENTEL KABUSHIKI KAUSHA·Filed 2008·Granted Jun 2, 2009·5 cites·1 claims
- 4129USD344748SComputer ribbon reinking systemPENTEL KK·Filed 1991·Granted Mar 1, 1994·1 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →