Inventor

Masayuki Hongu

Inventor

Komae, JP

Overview

28→

Patents

1976–1987

Patent span

Electricity

Primary field (CPC H)

Patents· 28 as inventor

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

H04Nprimary

H04NPictorial communication, e.g. television35%

H03DDemodulation or transference of modulation from one carrier to another18%

H03FAmplifiers10%

H03JTuning resonant circuits10%

H03GControl of amplification8%

H04BTransmission6%

H03BGeneration of oscillations, directly or by frequency-changing, by circuits employing active elements which operate in a non-switching manner4%

H03CModulation4%

G05FSystems for regulating electric or magnetic variables2%

H03HImpedance networks, e.g. resonant circuits2%

PatentTitleYear

4,673,983'Picture-in-picture television receivers'1987 4,631,589'Dark level restoring circuit'1986 4,419,695'Television sound receiver'1983 4,370,676'Carrier regenerating circuit for a synchronous detector'1983 4,322,751'Detector circuit for a television receiver'1982 4,283,792'Automatic fine tuning circuit'1981 4,263,675'AFT circuit'1981 4,261,016'Television receiver'1981 4,238,771'Muting circuit'1980 4,234,963'Synchronous detector particularly adapted for a video IF signal'1980 4,198,650'Capacitive-type nonlinear emphasis circuit'1980 4,169,248'Oscillating circuit'1979 4,165,498'Variable delay device'1979 4,163,196'Demodulating apparatus with phase shift compensation'1979 4,156,255'Television receiver with synchronous detection and automatic fine tuning'1979 4,132,952'Multi-band tuner with fixed broadband input filters'1979 4,115,737'Multi-band tuner'1978 4,110,635'Amplifying circuit'1978 4,083,019'Current controlled emitter coupled multivibrator'1978 4,081,837'Undesired signal canceller'1978 4,021,749'Signal amplifying circuit'1977 4,005,371'Bias circuit for differential amplifier'1977 3,987,317'Transistor biasing circuit'1976 3,986,145'Variable reactance circuit including differentially-connected transistor device providing a variable reactance input impedance'1976 3,986,058'Transistor biasing circuit'1976 3,974,460'High frequency modulator, such as an amplitude modulator, including a frequency multiplier'1976 3,968,453'Gain control circuit'1976 3,940,708'Gain control circuit'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1987Patents assigned to SONY CORP (28)· patent assignee history

1976–1980Based in Komae, JP· patent location history

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

1986–1987Based in Kanagawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SONY CORP	28	1976–1987

Locations

Location	Patents	Span
Komae, JP	17	1976–1980
Kawasaki, JP	9	1979–1983
Kanagawa, JP	2	1986–1987