Inventor

Norio Shoji

Inventor

Kanagawa, JP

Overview

24→

Patents

1987–2020

Patent span

Electricity

Primary field (CPC H)

Patents· 24 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 transducer20%

H03FAmplifiers18%

H03LAutomatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses13%

H03MCoding8%

B29CShaping or joining of plastics5%

F16LPipes5%

G05FSystems for regulating electric or magnetic variables5%

H03GControl of amplification5%

H03KPulse technique5%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%

PatentTitleYear

10,587,227Amplifier and electronic circuit2020 7,259,615'Bias voltage supply circuit and radio-frequency amplification circuit'2007 6,804,074'PLL circuit and recording and playback apparatus using same'2004 6,762,894'Head apparatus, hard disk apparatus and recording and playback apparatus'2004 6,693,863'Asymmetry correcting circuit and information reproducing apparatus using the same'2004 6,683,740'Architecture for a hard disk drive write amplifier circuit with damping control'2004 6,614,304'Variable gain circuit having external controls and a low supply voltage'2003 6,597,650'Nonlinearity compensation circuit and method, control circuit and method for nonlinearity compenstation circuit and recording and/or playback apparatus employing the same'2003 6,496,076'PLL circuit and recorded data reproduction apparatus'2002 6,400,184'Transistor output circuit'2002 6,154,333'Amplification circuit'2000 6,075,394'PLL circuit and recording or reproducing apparatus utilizing the same'2000 5,940,952'Method for applying corrosion-protective coating to joint between corrosion-protectively coated steel pipes'1999 5,926,936'Method for applying corrosion-protective coating to joint between corrosion-protectively coated steel pipes'1999 5,898,328'PLL circuit having a switched charge pump for charging a loop filter up or down and signal processing apparatus using the same'1999 5,864,249'PLL circuit and recording or reproducing apparatus utilizing the same'1999 5,742,199'Filter circuit and electronic apparatus'1998 5,691,663'Single-ended supply preamplifier with high power supply rejection ratio'1997 5,525,987'Analog to digital converter circuit'1996 5,500,774'Current setting circuit to provide a write current to a recording apparatus'1996 4,928,074'Automatic gain control circuit'1990 4,843,303'Voltage regulator circuit'1989 4,739,304'Digital-to-analog converting system'1988 4,714,841'Double-sided logic input differential switch'1987

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1987–2020Patents assigned to SONY CORP (22)· patent assignee history

1987–1999Based in Tokyo, JP· patent location history

1989–2020Based in Kanagawa, JP· patent location history

1997–2004Patents assigned to SONY ELECTRONICS INC (2)· patent assignee history

1997–2004Based in Yokohama, JP· patent location history

1999Patents assigned to NIPPON KOKAN KK (2)· patent assignee history

1999Patents assigned to NIPPON KOKAN KOJI KK (2)· patent assignee history

1999Patents assigned to NITTO DENKO CORP (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SONY CORP	22	1987–2020
NIPPON KOKAN KK	2	1999
NIPPON KOKAN KOJI KK	2	1999
NITTO DENKO CORP	2	1999
SONY ELECTRONICS INC	2	1997–2004

Locations

Location	Patents	Span
Kanagawa, JP	18	1989–2020
Tokyo, JP	4	1987–1999
Yokohama, JP	2	1997–2004