Inventor

Masanori Ienaka

Inventor

Kodaira, JP

Overview

1977–1988

Patent span

Electricity

Primary field (CPC H)

Patents· 18 as inventor

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

H03Dprimary

H03DDemodulation or transference of modulation from one carrier to another26%

H03KPulse technique13%

H03GControl of amplification10%

H04BTransmission10%

H04HBroadcast communication10%

G01RMeasuring electric variables6%

H03FAmplifiers6%

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

H02HEmergency protective circuit arrangements3%

H03JTuning resonant circuits3%

PatentTitleYear

4,751,469'Phase coincidence detector'1988 4,743,864'Power saving intermittently operated phase locked loop'1988 4,398,060'Muting circuit for an FM radio receiver'1983 4,362,998'FM Detector using a phase shift network and an analog multiplier'1982 4,356,350'FM Receiver'1982 4,313,145'Power output circuit'1982 4,292,549'Monostable multivibrator and FM detector circuit employing differential transistor pair (threshold) trigger circuit to avoid interference signal operation'1981 4,282,448'Monostable multivibrator and FM detector circuit employing common emitter transistor amplifier with plural emitter resistors to avoid circuit operation from signal noise'1981 4,277,703'Monostable multivibrator circuit with clamped non-saturating common emitter amplifier in feedback path'1981 4,276,442'Protective circuit'1981 4,268,762'Pulse forming circuit'1981 4,247,949'Signal strength detecting circuit'1981 4,236,117'FM Detector using a phase shift network and an analog multiplier'1980 4,236,252'Double-converting FM tuner'1980 4,166,925'FM stereo demodulator'1979 4,139,738'Multiplex decoder having a distortion-free differential amplifier'1979 4,037,056'FM multiplex demodulator circuit'1977 4,030,035'Circuit for preventing output clipping of R.F. stage in radio receiver'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–1988Patents assigned to HITACHI LTD (18)· patent assignee history

1977Based in Fuchu, JP· patent location history

1979–1983Based in Kodaira, JP· patent location history

1988Patents assigned to HITACHI VIDEO ENG (2)· patent assignee history

1988Based in Takasaki, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	18	1977–1988
HITACHI VIDEO ENG	2	1988

Locations

Location	Patents	Span
Kodaira, JP	14	1979–1983
Takasaki, JP	2	1988
Fuchu, JP	2	1977