Inventor

Takashi Seki

Inventor

Yokohama, JP

Overview

1994–2020

Patent span

Chemistry

Primary field (CPC C)

Patents· 53 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C08Fprimary

C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds12%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests11%

H04LTransmission of digital information, e.g. telegraphic communication10%

G02BOptical elements, systems or apparatus7%

C09KMaterials for miscellaneous applications, not provided for elsewhere5%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein4%

H10KOrganic electric solid-state devices4%

G01NInvestigating or analysing materials by determining their chemical or physical properties3%

H01LSemiconductor devices3%

C07FAcyclic, carbocyclic or heterocyclic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur, selenium or tellurium2%

PatentTitleYear

10,697,887Optical characteristic measuring apparatus2020 10,533,845Measuring device, measuring method, system and manufacturing method2020 10,432,392Frame synchronization method, processor, and communication apparatus2019 10,235,743Measuring apparatus, measuring method, and program2019 9,859,512'Substrate having rugged structure obtained from hydrophobic sol/gel material'2018 9,823,392'Optical substrate, mold to be used in optical substrate manufacture, and light emitting element including optical substrate'2017 9,790,903'Intake sound introducing apparatus'2017 9,719,922'Optical system and optical quality measuring apparatus'2017 9,660,217'Light emitting element and method for maufacturing light emitting element'2017 9,612,112'Optical system and optical quality measuring apparatus'2017 9,429,117'Intake sound introducing apparatus'2016 9,291,754'Method for producing mold for minute pattern transfer, method for producing diffraction grating using the same, and method for producing organic EL element including the diffraction grating'2016 9,207,585'Endless belt, belt driving device and image forming apparatus'2015 8,955,842'Image forming apparatus'2015 8,541,778'Diffraction grating, organic EL element using the same, and manufacturing methods thereof'2013 8,333,609'Connector, multi-channel audio system, electronic apparatus, and cable for connection'2012 8,284,850'OFDM reception apparatus'2012 8,265,121'Receiver'2012 8,137,766'Homeotropic alignment liquid crystal film, optical film comprising the same, and image display device'2012 8,132,067'OFDM receiving apparatus and OFDM receiving method'2012 7,998,543'Dioxetane compound, cationically polymerizable composition, optical film, and liquid crystal display device'2011 7,961,825'Diversity receiver and method'2011 7,763,182'Liquid crystalline composition with improved adhesivity, liquid crystal film comprising the composition, and liquid crystal display device equipped with the film'2010 7,732,024'Homeotropic alignment liquid crystal film, optical film comprising the same, and image display device'2010 7,416,765'Polymerizable liquid crystalline composition and liquid crystal film made from the composition'2008 7,386,311'Communication system, mobile communication network, contents server, program and recording medium'2008 7,206,279'OFDM receiving apparatus and method of demodulation in OFDM receiving apparatus'2007 7,166,684'Transition metal compound, catalyst for olefin polymerization and method for producing polyolefin'2007 7,125,590'Liquid crystal film and liquid crystal display device equipped with same'2006 7,070,711'Polymerizable liquid crystalline composition and liquid crystal film produced from the same'2006 7,035,264'Communication network system and method for synchronously controlling path connection'2006 6,983,027'OFDM transmit signal receiver'2006 6,771,719'Automatic gain control method and its system'2004 6,352,953'Catalyst containing novel transition metal compound for polymerization of olefins'2002 6,150,544'Transition metal compound and catalyst containing the same for polymerization of olefins'2000 6,081,563'AFC circuit of digital demodulation device'2000 5,824,618'Catalyst components for polymerization of olefins'1998 5,795,839'Catalyst components for polymerization of olefins'1998 5,771,224'Orthogonal frequency division multiplexing transmission system and transmitter and receiver therefor'1998 5,707,914'Catalyst components for polymerization of olefins'1998 5,694,389'OFDM transmission/reception system and transmitting/receiving apparatus'1997 5,677,401'Catalyst components for polymerization of olefins'1997 5,670,588'Process for the polymerization of olefinic hydrocarbons'1997 5,646,935'Hierarchical quadrature frequency multiplex signal format and apparatus for transmission and reception thereof'1997 5,643,845'Catalyst components for polymerization of olefins'1997 5,625,014'Method for polymerization of olefins'1997 5,608,764'OFDM synchronization demodulation circuit'1997 5,602,835'OFDM synchronization demodulation circuit'1997 5,594,082'Process for polymerization of olefinic hydrocarbon'1997 5,506,830'Disk player'1996 5,451,555'Catalyst components for polymerization of olefins'1995 5,387,567'Catalyst components for polymerization of olefins'1995 5,331,071'Catalyst components for polymerization of olefins'1994

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1994–1998Patents assigned to NIPPON OIL CO LTD (11)· patent assignee history

1994–2019Based in Yokohama, JP· patent location history

1996–2012Based in Kanagawa, JP· patent location history

1997–2019Patents assigned to TOSHIBA KK (14)· patent assignee history

2000–2002Based in Kawasaki, JP· patent location history

2006–2012Patents assigned to NIPPON OIL CORP (7)· patent assignee history

2008–2020Based in Tokyo, JP· patent location history

2012–2015Patents assigned to SEKI TAKASHI (7)· patent assignee history

2015–2020Patents assigned to CANON KK (7)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
TOSHIBA KK	14	1997–2019
NIPPON OIL CO LTD	11	1994–1998
CANON KK	7	2015–2020
NIPPON OIL CORP	7	2006–2012
SEKI TAKASHIself	7	2012–2015

Locations

Location	Patents	Span
Yokohama, JP	29	1994–2019
Tokyo, JP	11	2008–2020
Kanagawa, JP	11	1996–2012
Kawasaki, JP	2	2000–2002