Inventor

Seiji Okamoto

Inventor

Yokosuka, JP

Overview

31→

Patents

1985–2020

Patent span

Electricity

Primary field (CPC H)

Patents· 31 as inventor

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

G10Hprimary

G10HElectrophonic musical instruments14%

H04BTransmission14%

H04LTransmission of digital information, e.g. telegraphic communication14%

H04JMultiplex communication8%

C02FTreatment of water, waste water, sewage, or sludge7%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%

H03MCoding5%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein3%

H03FAmplifiers3%

H03KPulse technique3%

PatentTitleYear

10,841,006Signal-to-noise ratio estimation method, optical transmission apparatus, and optical transmission system2020 10,826,620Optical receiver, optical reception method, and optical communication system2020 10,651,944Optical transmitter, optical receiver, optical data transmission system, optical transmission method, and optical reception method2020 10,523,335Known signal detection method2019 10,389,452Coherent optical reception device2019 10,230,853Terminal device, diagnosis system and information output method for outputting information comprising an instruction regarding how to record a sound from a target apparatus2019 10,171,173Optical signal transmission apparatus and optical signal transmission method2019 10,038,507Optical transmission system, phase compensation method, and optical reception apparatus2018 9,942,652Terminal device and information output method2018 9,621,299'Coherent communication system, communication method, and transmission method'2017 9,444,483'Switch circuit, analog-to-digital converter, and integrated circuit'2016 9,135,903'Electronic keyboard instrument'2015 7,908,935'Feces collection container'2011 6,762,357'Resonance apparatus, resonance method and computer program for resonance processing'2004 6,572,771'Waste water treatment method'2003 6,413,417'Waste water treatment apparatus'2002 6,177,005'System for producing ultrapure water having a TOC density of no more than 0.5 ppb'2001 6,160,214'Non-consonance generating device and non-consonance generating method'2000 6,005,440'Operational amplifier'1999 5,923,196'Band-selectable phase-locked loop'1999 5,788,838'Ultrapure water production system having pretreatment system for performing both anaerobic and aerobic organism treatments'1998 5,767,801'Linear type digital-to-analog converter and driving method therefor'1998 5,691,496'Musical tone control apparatus for filter processing a musical tone waveform ONLY in a transient band between a pass-band and a stop-band'1997 5,641,929'Apparatus for and method of generating musical tones'1997 5,559,298'Waveform read-out system for an electronic musical instrument'1996 5,459,279'Electronic instrument for generating sounds based on the compressed waveform data stored beforehand'1995 5,432,513'Codec'1995 5,420,934'Electronic sound processing system'1995 5,379,294'Multipurpose analog front-end circuit'1995 5,289,058'MOS operational amplifier circuit'1994 4,494,824'Liquid crystal display with small impedance orienting film'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985–2003Patents assigned to SHARP KK (5)· patent assignee history

1994–1999Patents assigned to OKI ELECTRIC IND CO LTD (6)· patent assignee history

1994–1999Based in Tokyo, JP· patent location history

1995–2015Patents assigned to KAWAI MUSICAL INSTR MFG CO (7)· patent assignee history

1995–2015Based in Hamamatsu, JP· patent location history

1998–2003Based in Fukuyama, JP· patent location history

2016–2019Based in Yokohama, JP· patent location history

2017–2020Patents assigned to NIPPON TELEGRAPH & TELEPHONE (8)· patent assignee history

2017–2020Based in Yokosuka, JP· patent location history

2018–2019Patents assigned to FUJI XEROX CO LTD (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
NIPPON TELEGRAPH & TELEPHONE	8	2017–2020
KAWAI MUSICAL INSTR MFG CO	7	1995–2015
OKI ELECTRIC IND CO LTD	6	1994–1999
SHARP KK	5	1985–2003
FUJI XEROX CO LTD	2	2018–2019

Locations

Location	Patents	Span
Yokosuka, JP	7	2017–2020
Hamamatsu, JP	7	1995–2015
Tokyo, JP	6	1994–1999
Fukuyama, JP	4	1998–2003
Yokohama, JP	3	2016–2019