Inventor · disambiguated record
Tatsumaro Yamashita
Also filed as: YAMASHITA TATSUMARO
50 granted patents·9 pending applications·568 citations·filing 1984–2017
98Inventor score
Top patents by PatentIndex Score
59 records- 0197US7025482B2Light guide member and illuminating deviceALPS ELECTRIC CO LTD·Filed 2003·Granted Apr 11, 2006·127 cites·9 claims
- 0287US6664998B1Compound optical device, compound optical unit including the compound optical device, and optical pickup apparatus including the compound optical unitALPS ELECTRIC CO LTD·Filed 2000·Granted Dec 16, 2003·24 cites·25 claims
- 0386US7811010B2Camera apparatus with positioning tube and mounting baseALPS ELECTRIC CO LTD·Filed 2007·Granted Oct 12, 2010·9 cites·5 claims
- 0485US7471465B2Optical apparatusALPS ELECTRIC CO LTD·Filed 2008·Granted Dec 30, 2008·14 cites·10 claims
- 0585US7298561B1Optical deviceALPS ELECTRIC CO LTD·Filed 2007·Granted Nov 20, 2007·14 cites·7 claims
- 0684US7040796B2Illumination device and liquid crystal display deviceALPS ELECTRIC CO LTD·Filed 2003·Granted May 9, 2006·30 cites·13 claims
- 0784US6418114B1Optical disk cartridgeALPS ELECTRIC CO LTD·Filed 2000·Granted Jul 9, 2002·20 cites·7 claims
- 0881US9760774B2Line-of-sight detection apparatusALPS ELECTRIC CO LTD·Filed 2015·Granted Sep 12, 2017·5 cites·5 claims
- 0979US8134608B2Imaging apparatusYAMASHITA TATSUMARO·Filed 2008·Granted Mar 13, 2012·8 cites·11 claims
- 1079US6734929B2Illumination device having a single light source and liquid crystal display deviceALPS ELECTRIC CO LTD·Filed 2003·Granted May 11, 2004·26 cites·20 claims
- 1179US6560188B1Compound optical unit mounted on optical deviceALPS ELECTRIC CO LTD·Filed 2000·Granted May 6, 2003·14 cites·45 claims
- 1277US7177103B2Optical lens adjusting device and adjusting method thereofALPS ELECTRIC CO LTD·Filed 2005·Granted Feb 13, 2007·6 cites·12 claims
- 1377US6396800B1Optical disk cartridgeALPS ELECTRIC CO LTD·Filed 2000·Granted May 28, 2002·12 cites·14 claims
- 1476US9599463B2Object detection deviceALPS ELECTRIC CO LTD·Filed 2015·Granted Mar 21, 2017·2 cites·14 claims
- 1575US8570188B2Driver vision support system and vehicle including the systemYAMASHITA TATSUMARO·Filed 2011·Granted Oct 29, 2013·7 cites·10 claims
- 1675US4669002AMultiple magnetic head rotary transducer drum for simultaneous recording and reproducingALPS ELECTRIC CO LTD·Filed 1984·Granted May 26, 1987·18 cites·4 claims
- 1774US7423824B2Actuator, optical apparatus using actuator, and method of manufacturing actuatorALPS ELECTRIC CO LTD·Filed 2005·Granted Sep 9, 2008·8 cites·15 claims
- 1873US6628593B1Disk drive using plural optical heads, capable of identifying the types of mediaALPS ELECTRIC CO LTD·Filed 2000·Granted Sep 30, 2003·11 cites·6 claims
- 1971US7275853B2Illuminating device, light guide body and liquid crystal display deviceALPS ELECTRIC CO LTD·Filed 2003·Granted Oct 2, 2007·12 cites·12 claims
- 2068US9141185B2Input deviceALPS ELECTRIC CO LTD·Filed 2013·Granted Sep 22, 2015·1 cites·18 claims
- 2166US5349479AData transfer method of magnetic recording/reproducing apparatusALPS ELECTRIC CO LTD·Filed 1994·Granted Sep 20, 1994·20 cites·3 claims
- 2266US4623944AMagnetic tape guide drum with grounding deviceALPS ELECTRIC CO LTD·Filed 1984·Granted Nov 18, 1986·12 cites·7 claims
- 2364US5886961AOptical disk device capable of accessing a plural different types of optical disksALPS ELECTRIC CO LTD·Filed 1997·Granted Mar 23, 1999·17 cites·3 claims
- 2463US6621771B1Disk drive with an objective lens disposed in an optical head moving along a transfer line not intersecting the center of rotation of a diskALPS ELECTRIC CO LTD·Filed 2000·Granted Sep 16, 2003·5 cites·5 claims
- 2561US5018036ARotary head type magnetic recording and reproducing apparatus with dedicated recording and reproducing magnetic headsALPS ELECTRIC CO LTD·Filed 1989·Granted May 21, 1991·11 cites·4 claims
- 2658US6424617B1Optical disk cartridgeALPS ELECTRIC CO LTD·Filed 2000·Granted Jul 23, 2002·3 cites·9 claims
- 2757US6222690B1Tape speed sensor, control circuit using tape speed sensor and method of controlling tape speed sensor using control circuitALPS ELECTRIC CO LTD·Filed 1998·Granted Apr 24, 2001·12 cites·14 claims
- 2857US6130744AOptical disk discriminating method, including memory storage, for automatic multiple-disk changerALPS ELECTRIC CO LTD·Filed 1998·Granted Oct 10, 2000·12 cites·8 claims
- 2955US5959950ADisk drive capable of loading a disk package containing multiple disks of different types and locking mechanism dependent on individual disk typeALPS ELECTRIC CO LTD·Filed 1997·Granted Sep 28, 1999·11 cites·5 claims
- 3054US6392986B1Optical disk cartridgeALPS ELECTRIC CO LTD·Filed 2000·Granted May 21, 2002·2 cites·2 claims
- 3152US5982734ADisk packageALPS ELECTRIC CO LTD·Filed 1997·Granted Nov 9, 1999·10 cites·1 claims
- 3251US5490018AData processing apparatus having a digital recording and reproducing system and an analog reproducing systemALPS ELECTRIC CO LTD·Filed 1994·Granted Feb 6, 1996·8 cites·3 claims
- 3350US6411446B1Device for securing optical elementALPS ELECTRIC CO LTD·Filed 2000·Granted Jun 25, 2002·3 cites·14 claims
- 3450US6009069ADisk package capable of loading a disk package containing multiple disks of different types and locking mechanism dependent on individual disk typeALPS ELECTRIC CO LTD·Filed 1997·Granted Dec 28, 1999·9 cites·5 claims
- 3549US5987000ADisc packageALPS ELECTRIC CO LTD·Filed 1997·Granted Nov 16, 1999·8 cites·2 claims
- 3647US2006039825A1Testing plate and test method using the sameALPS ELECTRIC CO LTD·Filed 2005·Application pending·0 cites
- 3745US4924325AHead position controlling methodALPS ELECTRIC CO LTD·Filed 1988·Granted May 8, 1990·6 cites·2 claims
- 3845US4709287AHead height adjustment construction in magnetic recording and reproducing apparatus with rotary cylinderALPS ELECTRIC CO LTD·Filed 1985·Granted Nov 24, 1987·6 cites·2 claims
- 3945US4649306ADirect drive motor having adjustable bearing for spindleALPS ELECTRIC CO LTD·Filed 1985·Granted Mar 10, 1987·12 cites·2 claims
- 4043US10041787B2Object detection deviceALPS ELECTRIC CO LTD·Filed 2016·Granted Aug 7, 2018·0 cites·8 claims
- 4143US2014079285A1Movement prediction device and input apparatus using the sameALPS ELECTRIC CO LTD·Filed 2013·Application pending·0 cites
- 4243US2006057708A1Testing plateALPS ELECTRIC CO LTD·Filed 2005·Application pending·0 cites
- 4342US5959949ADisk package for storage of multiple disks of different types and locking mechanism dependent on individual disk typeALPS ELECTRIC CO LTD·Filed 1997·Granted Sep 28, 1999·5 cites·4 claims
- 4442US5345345ARotary head type magnetic recording/reproducing unitALPS ELECTRIC CO LTD·Filed 1993·Granted Sep 6, 1994·5 cites·12 claims
- 4542US2006034727A1Test plate and test method using the sameALPS ELECTRIC CO LTD·Filed 2005·Application pending·0 cites
- 4641US5063466ARotary head type magnetic recording and reproducing apparatusALPS ELECTRIC CO LTD·Filed 1989·Granted Nov 5, 1991·4 cites·12 claims
- 4741US2017156590A1Line-of-sight detection apparatusALPS ELECTRIC CO LTD·Filed 2017·Application pending·0 cites
- 4840US2006057709A1Plate and test method using the sameALPS ELECTRIC CO LTD·Filed 2005·Application pending·0 cites
- 4939US6751186B2Optical disk cartridgeALPS ELECTRIC CO LTD·Filed 2000·Granted Jun 15, 2004·0 cites·4 claims
- 5039US5978340ACompact switching means for driving a recording mediumALPS ELECTRIC CO LTD·Filed 1997·Granted Nov 2, 1999·4 cites·8 claims
Showing the top 50 of 59 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Tatsumaro Yamashita files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →