Inventor

Yukinari Fujiwara

Inventor

Musashimurayama, JP

Overview

10→

Patents

1980–2003

Patent span

Electricity

Primary field (CPC H)

Patents· 10 as inventor

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

H03Fprimary

H03FAmplifiers17%

H04BTransmission17%

H04LTransmission of digital information, e.g. telegraphic communication17%

H03CModulation11%

H03DDemodulation or transference of modulation from one carrier to another11%

H03GControl of amplification6%

H03LAutomatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses6%

H04JMultiplex communication6%

H04WWireless communication networks6%

Y02DClimate change mitigation technologies in information and communication technologies [ict], i.e. information and communication technologies aiming at the reduction of their own energy use6%

PatentTitleYear

6,603,359'High-frequency power amplifying apparatus'2003 6,246,732'Demodulator including adaptive equalizer and demodulating method in digital communications'2001 5,889,766'Transmission/reception method based on frequency division multiple access having changeable communication channel bandwidths and communication apparatus employing the method'1999 5,802,451'Non-linear compensation circuit for a power amplifier'1998 5,771,263'Communication system control method and communication system using the method'1998 5,432,842'Mobile communication switching across cell boundaries'1995 5,068,624'Amplifier'1991 4,754,235'Frequency synthesizer with low power consumption'1988 4,476,437'System for detecting abnormal condition of high frequency output signal in its power level'1984 4,231,116'Radio station system'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–1995Patents assigned to HITACHI LTD (2)· patent assignee history

1980–2001Based in Musashimurayama, JP· patent location history

1984–2001Patents assigned to HITACHI ELECTRONICS (7)· patent assignee history

1988Based in Kodaira, JP· patent location history

1991–2003Based in Tokyo, JP· patent location history

2003Patents assigned to MOBILE COMM TOKYO INC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI ELECTRONICS	7	1984–2001
HITACHI LTD	2	1980–1995
MOBILE COMM TOKYO INC	1	2003

Locations

Location	Patents	Span
Musashimurayama, JP	7	1980–2001
Tokyo, JP	2	1991–2003
Kodaira, JP	1	1988