Inventor · disambiguated record
Tetsuya Sakai
Also filed as: SAKAI TETSUYA
79 granted patents·25 pending applications·1,305 citations·filing 1992–2025
99Inventor score
Top patents by PatentIndex Score
104 records- 0196US7492993B2Multi-port coupler, optical amplifier, and fiber laserFUJIKURA LTD·Filed 2007·Granted Feb 17, 2009·33 cites·13 claims
- 0294US5907836AInformation filtering apparatus for selecting predetermined article from plural articles to present selected article to user, and method thereforeTOSHIBA KK·Filed 1996·Granted May 25, 1999·235 cites·18 claims
- 0393US5267339AOptical fiber having a core with a repeatedly changing constitutional parameterFUJIKURA LTD·Filed 1992·Granted Nov 30, 1993·64 cites·12 claims
- 0492US10795313B2Image forming device, image printing method, and computer program of foil printingKONICA MINOLTA INC·Filed 2019·Granted Oct 6, 2020·6 cites·9 claims
- 0592US7099819B2Text information analysis apparatus and methodTOSHIBA KK·Filed 2001·Granted Aug 29, 2006·74 cites·22 claims
- 0691US9776333B2Hand member and handHIRATA SPINNING·Filed 2016·Granted Oct 3, 2017·10 cites·11 claims
- 0790US5778279AImage forming apparatus estimating a consumable life of a component using fuzzy logicMINOLTA CO LTD·Filed 1996·Granted Jul 7, 1998·47 cites·26 claims
- 0889US11387726B2Rotary table deviceNIPPON THOMPSON CO LTD·Filed 2020·Granted Jul 12, 2022·2 cites·6 claims
- 0989US8473499B2Question and answer forum techniquesSONG YOUNG-IN·Filed 2011·Granted Jun 25, 2013·35 cites·18 claims
- 1089US8126309B2Video playback apparatus and methodSAKAI TETSUYA·Filed 2008·Granted Feb 28, 2012·13 cites·6 claims
- 1187US9494219B2Small opening/closing sliderNIPPON THOMPSON CO LTD·Filed 2015·Granted Nov 15, 2016·4 cites·9 claims
- 1287US8925408B2Actuator available in controlled environmentSAKAI TETSUYA·Filed 2012·Granted Jan 6, 2015·10 cites·1 claims
- 1387US7840107B2Optical pumping device, optical amplifier, fiber laser, and multicore fiber for optical pumping deviceFUJIKURA LTD·Filed 2007·Granted Nov 23, 2010·10 cites·17 claims
- 1486US5474588ASolution doping of a silica preform with erbium, aluminum and phosphorus to form an optical fiberFUJIKURA LTD·Filed 1994·Granted Dec 12, 1995·32 cites·6 claims
- 1584US6052714AInformation filtering apparatus and method for retrieving a selected article from information sourcesTOSHIBA KK·Filed 1996·Granted Apr 18, 2000·87 cites·21 claims
- 1683US8090281B2Image forming apparatus and tone correction methodHIROTA SOH·Filed 2008·Granted Jan 3, 2012·8 cites·6 claims
- 1783US6092091ADevice and method for filtering information, device and method for monitoring updated document information and information storage medium used in same devicesTOSHIBA KK·Filed 1997·Granted Jul 18, 2000·83 cites·46 claims
- 1883US5708917AToner replenishment device for an image forming apparatus which employs pixel density and toner density informationMINOLTA CO LTD·Filed 1996·Granted Jan 13, 1998·34 cites·11 claims
- 1981US7149439B2Method and device for estimating toner concentration and image forming apparatus equipped with such deviceKONICA MINOLTA BUSINESS TECH·Filed 2004·Granted Dec 12, 2006·19 cites·8 claims
- 2081US6982813B2Light quantity correction method for exposing device, and image forming deviceMINOLTA CO LTD·Filed 2001·Granted Jan 3, 2006·22 cites·30 claims
- 2179US8422085B2Image reader and image forming apparatusSAKAI TETSUYA·Filed 2009·Granted Apr 16, 2013·6 cites·8 claims
- 2278US8081326B2Color imaging forming apparatus with image stabilization control and method thereforeOKUNISHI KAZUO·Filed 2007·Granted Dec 20, 2011·6 cites·12 claims
- 2377US11988276B2Rotary tableNIPPON THOMPSON CO LTD·Filed 2020·Granted May 21, 2024·1 cites·14 claims
- 2477US5732170AOptical fiber filterFUJIKURA LTD·Filed 1996·Granted Mar 24, 1998·47 cites·22 claims
- 2576US11532988B2DAB converterTDK CORP·Filed 2021·Granted Dec 20, 2022·1 cites·21 claims
- 2676US9796092B2Multi-articulated manipulatorNIPPON THOMPSON CO LTD·Filed 2016·Granted Oct 24, 2017·3 cites·16 claims
- 2775US7698721B2Video viewing support system and methodTOSHIBA KK·Filed 2006·Granted Apr 13, 2010·4 cites·24 claims
- 2875US6443807B1Polishing process for use in method of fabricating semiconductor deviceNEC CORP·Filed 2000·Granted Sep 3, 2002·18 cites·28 claims
- 2975US6419962B1External skin treatment compositionSHISEIDO CO LTD·Filed 1997·Granted Jul 16, 2002·43 cites·8 claims
- 3075US5774762AImage forming apparatus for optimizing toner transfer efficiencyMINOLTA CO LTD·Filed 1997·Granted Jun 30, 1998·21 cites·25 claims
- 3173US5805956AElectrophotographic image forming apparatus capable of setting image forming conditions and method for setting image forming conditions in an electrophotographic image forming apparatusMINOLTA CO LTD·Filed 1996·Granted Sep 8, 1998·23 cites·29 claims
- 3273US2025115859A1Cell processing systemCANON MEDICAL SYSTEMS CORP·Filed 2024·Application pending·0 cites
- 3372US8061227B2Small slider unitSAKAI TETSUYA·Filed 2008·Granted Nov 22, 2011·4 cites·1 claims
- 3472US7983507B2Image fo ming device and image forming methodKONICA MINOLTA BUSINESS TECH·Filed 2007·Granted Jul 19, 2011·3 cites·13 claims
- 3572US2025115849A1Culture systemCANON KK·Filed 2024·Application pending·0 cites
- 3670US8353225B2ActuatorNIPPON THOMPSON CO LTD·Filed 2009·Granted Jan 15, 2013·6 cites·1 claims
- 3770US7603047B2Image forming apparatus capable of forming high-quality imageKONICA MINOLTA BUSINESS TECH·Filed 2007·Granted Oct 13, 2009·3 cites·12 claims
- 3870US7409122B2End face structure of optical fiber, optical fiber laser, and laser processing apparatusFUJIKURA LTD·Filed 2005·Granted Aug 5, 2008·3 cites·37 claims
- 3970US5949934AOptical waveguide grating and production method thereforFUJIKURA LTD·Filed 1997·Granted Sep 7, 1999·35 cites·8 claims
- 4070US5581221AElectrophotographic image forming apparatusMINOLTA CO LTD·Filed 1994·Granted Dec 3, 1996·17 cites·18 claims
- 4170US2025075159A1Cell production cartridge and systemCANON KK·Filed 2024·Application pending·0 cites
- 4269US7787006B2Image forming apparatus capable of forming excellent imageKONICA MINOLTA BUSINESS TECH·Filed 2007·Granted Aug 31, 2010·3 cites·9 claims
- 4369US2025115851A1Cartridge, liquid transfer system, and methodCANON KK·Filed 2024·Application pending·0 cites
- 4469US2025115852A1Cell handling system, cell handling apparatus, and cell handling cartridgeCANON KK·Filed 2024·Application pending·0 cites
- 4569US2025145931A1Cell treatment apparatus, cell treatment method and cell treatment systemCANON KK·Filed 2024·Application pending·0 cites
- 4668US12383996B2Rotary tableNIPPON THOMPSON CO LTD·Filed 2022·Granted Aug 12, 2025·0 cites·8 claims
- 4768US6285839B1Image forming apparatus having function for automatically adjusting image forming conditionMINOLTA CO LTD·Filed 1999·Granted Sep 4, 2001·19 cites·10 claims
- 4868US2025116582A1Sample processing apparatus, sample processing system, and cartridgeCANON MEDICAL SYSTEMS CORP·Filed 2024·Application pending·0 cites
- 4967USD871194SPadHIRATA SPINNING·Filed 2018·Granted Dec 31, 2019·9 cites·1 claims
- 5067US5930437AOptical filter with planar optical waveguide having periodically varied distribution of refractive index and production process thereofFUJIKURA LTD·Filed 1997·Granted Jul 27, 1999·31 cites·8 claims
Showing the top 50 of 104 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Tetsuya Sakai 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 →