Inventor

Masuo Umemoto

Inventor

Tokyo, JP

Overview

22→

Patents

1976–2000

Patent span

Electricity

Primary field (CPC H)

Patents· 22 as inventor

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

G11Bprimary

G11BInformation storage based on relative movement between record carrier and transducer42%

H04NPictorial communication, e.g. television36%

H10FInorganic semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation8%

H03MCoding6%

G06FElectric digital data processing3%

H04JMultiplex communication3%

H04LTransmission of digital information, e.g. telegraphic communication3%

PatentTitleYear

6,130,797'Magnetic recorder and magnetooptical recorder'2000 5,881,071'Digital write-and-read method and signal processing apparatus'1999 5,786,952'Magnetic digital storage method and system wherein magnetic transition points in adjacent recorded tracks are out of phase with each other'1998 5,594,756'Decision feedback equalization circuit'1997 5,552,940'Method and apparatus for digital signal recording and/or reproduction'1996 5,247,401'Replay equalization circuit in digital image recorder'1993 4,868,853'Demodulation circuit for digital modulated signal'1989 4,802,192'Circuit for detecting synchronizing code'1989 4,791,495'Digital signal recording and reproducing system having an interface for dubbing a color television signal in the component form'1988 4,775,897'Dubbing method and apparatus for digital recording reproducing apparatus including direct digital outputs'1988 4,737,863'Method for distributing and recording video signals and an apparatus using the same'1988 4,700,240'Digital data playback system'1987 4,698,811'Method and apparatus for generating error correction codes for digitized picture signal recording/reproducing'1987 4,661,956'Method of correcting errors of digital signals in the recording and reproduction of digital signals'1987 4,628,297'Code modulation system'1986 4,467,347'Color imaging device'1984 4,283,742'Solid-state imaging apparatus with fixed pattern noise reduction'1981 4,281,338'Solid state color imaging apparatus'1981 4,246,601'Solid-state color imaging device'1981 4,245,241'Solid-state color imaging device'1981 4,223,187'Method and apparatus for recording and reproducing a video-disc with an oscillated track'1980 3,979,721'Pulse code modulation recording and reproducing apparatus'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–2000Patents assigned to HITACHI LTD (22)· patent assignee history

1976–2000Based in Tokyo, JP· patent location history

1980Based in Hachioji, JP· patent location history

1981–1996Based in Hinode, JP· patent location history

1986–1989Patents assigned to HITACHI ELECTRONICS (8)· patent assignee history

1987–1993Based in Nishitama-gun, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	22	1976–2000
HITACHI ELECTRONICS	8	1986–1989

Locations

Location	Patents	Span
Tokyo, JP	15	1976–2000
Hinode, JP	4	1981–1996
Nishitama-gun, JP	2	1987–1993
Hachioji, JP	1	1980