Inventor

MITSUYA YOSHIHIDE

JP56 patents

⚠️ This page may combine multiple inventors who share the name “MITSUYA YOSHIHIDE”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

KOTOBUKI & CO LTD

47 patents

US5370471ADec 6, 1994

Writing tool, with eraser dispenser

KOTOBUKI & CO LTD30 citations94

US5997200ADec 7, 1999

Barrel with finger gripping means

KOTOBUKI & CO LTD28 citations93

US5988908ANov 23, 1999

Barrel with finger gripping means

KOTOBUKI & CO LTD27 citations93

US5662425ASep 2, 1997

Stick-shaped material propelling container

KOTOBUKI & CO LTD20 citations93

US5022774AJun 11, 1991

Writing tool with eraser dispenser

KOTOBUKI & CO LTD24 citations92

US5480249AJan 2, 1996

Lead dispensing storage container

KOTOBUKI & CO LTD24 citations91

US5553956ASep 10, 1996

Stick-shaped material propelling device

KOTOBUKI & CO LTD28 citations90

US6491467B1Dec 10, 2002

Writing instrument

KOTOBUKI & CO LTD14 citations84

US5971644AOct 26, 1999

Side knock-type writing instrument

KOTOBUKI & CO LTD19 citations84

US5702193ADec 30, 1997

Side knock type mechanical pencil

KOTOBUKI & CO LTD14 citations82

US5683191ANov 4, 1997

Writing tool

KOTOBUKI & CO LTD17 citations82

US5549404AAug 27, 1996

Stick-shaped material drive container and supply cassette

KOTOBUKI & CO LTD19 citations82

US5207522AMay 4, 1993

Knock type mechanical pencil with retractable eraser

KOTOBUKI & CO LTD10 citations82

US5062727ANov 5, 1991

Writing tool

KOTOBUKI & CO LTD12 citations81

US6325130B1Dec 4, 2001

Coat transfer tool

KOTOBUKI & CO LTD15 citations79

US5074694ADec 24, 1991

Latch mechanism for retractable writing instruments

KOTOBUKI & CO LTD17 citations79

US6171397B1Jan 9, 2001

Paint film transfer device

KOTOBUKI & CO LTD7 citations74

US6039484AMar 21, 2000

Writing instrument

KOTOBUKI & CO LTD14 citations74

US5988914ANov 23, 1999

Writing instrument

KOTOBUKI & CO LTD7 citations74

US5803637ASep 8, 1998

Stick-shaped material propelling container

KOTOBUKI & CO LTD14 citations74

US5090831AFeb 25, 1992

Writing instrument

KOTOBUKI & CO LTD9 citations74

US4998837AMar 12, 1991

Lead cartridge with an openable capping structure

KOTOBUKI & CO LTD13 citations74

US4955739ASep 11, 1990

Mechanical pencil having side push button actuated lead advance

KOTOBUKI & CO LTD13 citations74

US4896982AJan 30, 1990

Lead feed mechanism for mechanical pencil

KOTOBUKI & CO LTD7 citations74

US6517272B1Feb 11, 2003

Double-chuck mechanical pencil

KOTOBUKI & CO LTD11 citations73

US6039485AMar 21, 2000

Double-chuck mechanical pencil

KOTOBUKI & CO LTD7 citations73

US5988913ANov 23, 1999

Double-chuck mechanical pencil

KOTOBUKI & CO LTD12 citations73

US5947620ASep 7, 1999

Double-chuck mechanical pencil

KOTOBUKI & CO LTD8 citations73

US5700101ADec 23, 1997

Writing tool

KOTOBUKI & CO LTD4 citations73

US5462376AOct 31, 1995

Mechanical pencil with improved slider mechanism

KOTOBUKI & CO LTD11 citations73

US5236270AAug 17, 1993

Writing tool for advancing lead with eraser dispenser

KOTOBUKI & CO LTD7 citations73

US5788118AAug 4, 1998

Lead dispensing storage container

KOTOBUKI & CO LTD7 citations72

US5306107AApr 26, 1994

Twin-type stick-shaped material extending container

KOTOBUKI & CO LTD15 citations72

US5056947AOct 15, 1991

Dual refill-type writing utensil

KOTOBUKI & CO LTD17 citations72

US4973179ANov 27, 1990

Clip actuated latch mechanism for retractable writing instruments

KOTOBUKI & CO LTD13 citations72

US4884910ADec 5, 1989

Mechanical pencil

KOTOBUKI & CO LTD10 citations72

US4872776AOct 10, 1989

Lead chuck of mechanical pencil

KOTOBUKI & CO LTD10 citations72

US6287036B1Sep 11, 2001

Knocking writing utensil

KOTOBUKI & CO LTD4 citations63

US6082916AJul 4, 2000

Mechanical pencil

KOTOBUKI & CO LTD5 citations63

US5165813ANov 24, 1992

Container with snap-in chuck and chuck ring

KOTOBUKI & CO LTD6 citations63

US4957384ASep 18, 1990

Mechanical pencil

KOTOBUKI & CO LTD5 citations63

US4836703AJun 6, 1989

Lead cartridge opening and closing unit

KOTOBUKI & CO LTD5 citations63

US6517271B1Feb 11, 2003

Double-chuck mechanical pencil

KOTOBUKI & CO LTD4 citations62

US6379067B2Apr 30, 2002

Double-chuck mechanical pencil

KOTOBUKI & CO LTD3 citations62

US6210058B1Apr 3, 2001

Side knock type mechanical pencil

KOTOBUKI & CO LTD2 citations62

US6099182AAug 8, 2000

Side knock-type mechanical pencil

KOTOBUKI & CO LTD2 citations62

US5890827AApr 6, 1999

Bar extruding implement with ejector

KOTOBUKI & CO LTD4 citations62

CROWN FANCY GOODS CO LTD

1 patent

US5713680AFeb 3, 1998

Combined writing tool

CROWN FANCY GOODS CO LTD26 citations84

SAKURA COLOR PROD CORP

1 patent

US4143473AMar 13, 1979

Memorizing aid

SAKURA COLOR PROD CORP7 citations74

KOTOBUKO & CO LTD

1 patent

US5018891AMay 28, 1991

Writing instrument with eraser dispenser

KOTOBUKO & CO LTD13 citations69

Showing the top 50 of 56 patents by PatentIndex Score.