Inventor

YAMAMOTO TAKEHARU

JP73 patents

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

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

27 patents

US6298019B1Oct 2, 2001

Optical disk apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD39 citations96

US6285635B1Sep 4, 2001

Optical disk apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD61 citations96

US6011762AJan 4, 2000

Optical disk apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD64 citations96

US6891785B2May 10, 2005

Optical disc reproduction apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD26 citations93

US6493304B2Dec 10, 2002

Optical disk apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD18 citations93

US6134197AOct 17, 2000

Optical disk drive apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD31 citations93

US6028826AFeb 22, 2000

Optical disk apparatus performing correction of phase difference tracking error signal, adjustment of focus position and process of gain adjustment

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD36 citations93

US6628580B1Sep 30, 2003

Optical recording and reproducing apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD35 citations92

US6400663B1Jun 4, 2002

Optical disc apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD33 citations92

US6181651B1Jan 30, 2001

Optical recording/reproducing apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD19 citations90

US7327642B2Feb 5, 2008

Method of moving a beam spot between information storage layers of an optical disk

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD18 citations84

US6925037B2Aug 2, 2005

Optical disc drive and optical disc controller

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD13 citations84

US6714493B1Mar 30, 2004

Optical disk apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD13 citations84

US6498772B1Dec 24, 2002

Optical disc apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD19 citations84

US5699334ADec 16, 1997

Control devices for optical disk based on driving signal saturation

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD18 citations84

US6339566B1Jan 15, 2002

Optical recording/reproduction device

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD14 citations82

US7218582B2May 15, 2007

Optical disc drive

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD7 citations74

US6611480B2Aug 26, 2003

Optical disk drive apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD7 citations74

US6567357B2May 20, 2003

Optical disk apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD12 citations74

US6330213B1Dec 11, 2001

Optical disk drive apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD8 citations74

US6317395B1Nov 13, 2001

Optical disc device for varying PLL characteristic and servo characteristic based on actual reproduction speed

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD13 citations74

US6834030B2Dec 21, 2004

Optical disk apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD5 citations63

US6356522B1Mar 12, 2002

Optical disk drive

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD2 citations63

US7193941B2Mar 20, 2007

Optical disc drive with clock synchronization and rotational speed detection

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD2 citations62

US6925048B2Aug 2, 2005

Optical disc apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD4 citations62

US7154832B2Dec 26, 2006

Judgement of optical disc type based on changes of rotating speed of a disc

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD1 citations52

US6961301B2Nov 1, 2005

Optical disk having synchronization region formed between pre-recorded area and recordable area

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD0 citations52

UBE MACHINERY CORP LTD

7 patents

US7591163B2Sep 22, 2009

Extrusion molding method and apparatus of extrusion press

UBE MACHINERY CORP LTD11 citations84

US10124382B2Nov 13, 2018

Billet transport device for extrusion press

UBE MACHINERY CORP LTD3 citations66

US10307807B2Jun 4, 2019

Extrusion press

UBE MACHINERY CORP LTD1 citations63

US10124383B2Nov 13, 2018

Extrusion method for extruded material

UBE MACHINERY CORP LTD0 citations52

US9498808B2Nov 22, 2016

Container degassing device for extrusion press

UBE MACHINERY CORP LTD0 citations52

US7765845B2Aug 3, 2010

Stem slide device

UBE MACHINERY CORP LTD0 citations52

US11273479B2Mar 15, 2022

Extrusion press shearing device

UBE MACHINERY CORP LTD0 citations49

PANASONIC CORP

5 patents

USRE40946EOct 27, 2009

Optical disk apparatus

PANASONIC CORP9 citations84

US7652970B2Jan 26, 2010

Light information apparatus and control method of light information apparatus

PANASONIC CORP2 citations63

US8036254B2Oct 11, 2011

Semiconductor laser driving circuit, and optical disc device and integrated circuit provided with semiconductor laser driving circuit

PANASONIC CORP3 citations62

USRE41372EJun 8, 2010

Optical disc apparatus

PANASONIC CORP2 citations62

US7480232B2Jan 20, 2009

Optical disc apparatus

PANASONIC CORP0 citations51

YAMAMOTO TAKEHARU

5 patents

US8490453B2Jul 23, 2013

Extrusion press

YAMAMOTO TAKEHARU10 citations83

US9114447B2Aug 25, 2015

Extrusion press

YAMAMOTO TAKEHARU4 citations73

US8122752B2Feb 28, 2012

Discard conveying apparatus

YAMAMOTO TAKEHARU3 citations61

US8650926B2Feb 18, 2014

Extrusion press and extrusion control method

YAMAMOTO TAKEHARU3 citations59

US8438892B2May 14, 2013

Stem slide device

YAMAMOTO TAKEHARU0 citations51

DAIDO METAL CO

3 patents

US9188159B2Nov 17, 2015

Half thrust bearing and bearing device

DAIDO METAL CO19 citations90

US9062714B2Jun 23, 2015

Bearing device

DAIDO METAL CO5 citations73

US8936398B2Jan 20, 2015

Bearing device

DAIDO METAL CO3 citations63

TAKAZAWA MINORU

1 patent

US8174941B2May 8, 2012

Optical disc apparatus, crosstalk correction method and integrated circuit

TAKAZAWA MINORU8 citations75

YAKUSHIGAWA ATSUSHI

1 patent

US9643225B2May 9, 2017

Extrusion press

YAKUSHIGAWA ATSUSHI4 citations64

KOMMA YOSHIAKI

1 patent

US8395980B2Mar 12, 2013

Optical head device, optical information device, and information processing device

KOMMA YOSHIAKI2 citations63

Showing the top 50 of 73 patents by PatentIndex Score.