Inventor

OKAMOTO SEIJI

JP59 patents

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

OKAMOTO SEIJI

NIPPON TELEGRAPH & TELEPHONE

Coherent communication system, communication method, and transmission method

Optical transmission system and transmission mode selecting method

Optical signal transmission apparatus and optical signal transmission method

Optical and electronic integrated switch

Optical and electronic integrated switch

Optical and electronic integrated switch and optical network system

Digital coherent receiver and digital coherent receiving method

Optical transmission system, phase compensation method, and optical reception apparatus

Optical transmitting apparatus and transmission characteristics estimation method

State estimating device and communication system

Wavelength dispersion compensation apparatus, optical receiving apparatus, wavelength dispersion compensation method and computer program

Receiving apparatus and receiving method

Signal-to-noise ratio estimation method, optical transmission apparatus, and optical transmission system

Signal processing apparatus and signal processing method

Optical transmission system

Optical receiving apparatus and waveform distortion compensation method

Optical transmission system, optical transmitting apparatus, and optical receiving apparatus

Communication system, optical transmitting apparatus, and optical receiving apparatus

Adaptive equalization filter and method for updating filter coefficients

Optical and electronic integrated switch

Optical communication network management apparatus

Signal processing apparatus, signal processing method, and program

Wavelength dispersion amount estimation apparatus

Optical transmission system, optical receiving apparatus and optical transmission method

Wavelength dispersion compensation apparatus, wavelength dispersion compensation method, and optical receiving apparatus

OKI ELECTRIC IND CO LTD

Operational amplifier

Band-selectable phase-locked loop

Linear type digital-to-analog converter and driving method therefor

Codec

MOS operational amplifier circuit

Multipurpose analog front-end circuit

KAWAI MUSICAL INSTR MFG CO

Musical tone control apparatus for filter processing a musical tone waveform ONLY in a transient band between a pass-band and a stop-band

Waveform read-out system for an electronic musical instrument

Resonance apparatus, resonance method and computer program for resonance processing

Electronic instrument for generating sounds based on the compressed waveform data stored beforehand

Electronic sound processing system

Apparatus for and method of generating musical tones

SHARP KK

Waste water treatment method

Ultrapure water production system having pretreatment system for performing both anaerobic and aerobic organism treatments

Liquid crystal display with small impedance orienting film

Waste water treatment apparatus

System for producing ultrapure water having a TOC density of no more than 0.5 ppb

KK KAWAI GAKKI SEISAKUSHO

Musical tone generating device and control method of musical tone generating device

Digital signal processing device and control method of digital signal processing device

Digital signal processing device and control method of digital signal processing device

NIPRO CORP

Feces collection container

KAWAI MUSICAL INSTRUMENTS MFG CO LTD

Keyboard device for electronic keyboard instrument

SOCIONEXT INC

Switch circuit, analog-to-digital converter, and integrated circuit

NTT INC

Optical transmission system and transmission mode selecting method

FUJI XEROX CO LTD

Terminal device, diagnosis system and information output method for outputting information comprising an instruction regarding how to record a sound from a target apparatus