Inventor

Akira Yamagiwa

Inventor

Hadano, JP

Overview

1981–2012

Patent span

Electricity

Primary field (CPC H)

Patents· 58 as inventor

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

G06Fprimary

G06FElectric digital data processing25%

H05KPrinted circuits20%

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

H04BTransmission11%

H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h109%

H03KPulse technique7%

Y02PClimate change mitigation technologies in the production or processing of goods3%

Y10TTechnical subjects covered by former us classification3%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests1%

D01HSpinning or twisting1%

PatentTitleYear

8,106,677'Signal transmitting device suited to fast signal transmission'2012 7,911,224'Signal transmitting device suited to fast signal transmission'2011 7,791,366'Signal transmitting device suited to fast signal transmission'2010 7,372,292'Signal transmitting device suited to fast signal transmission'2008 7,295,034'Signal transmitting device suited to fast signal transmission'2007 7,123,048'Signal transmitting device suited to fast signal transmission'2006 7,015,717'Signal transmitting device suited to fast signal transmission'2006 6,873,179'Signal transmitting device suited to fast signal transmission'2005 6,829,574'Logic emulation module and logic emulation board'2004 6,780,677'Process for mounting electronic device and semiconductor device'2004 6,768,346'Signal transmission system'2004 6,766,404'Branch bus system for inter-LSI data transmission'2004 6,737,741'Process for mounting electronic device and semiconductor device'2004 6,580,295'Signal transmission system'2003 6,496,886'Directional coupling bus system using printed board'2002 6,461,896'Process for mounting electronic device and semiconductor device'2002 6,441,638'Bus system and circuit board'2002 6,441,639'Circuit module connected to a transmission line including arrangement to suppress reflections at a branch point of the transmission line'2002 6,420,900'Semiconductor memory'2002 6,335,867'Apparatus for interconnecting logic boards'2002 6,266,242'Circuit module and information processing apparatus'2001 6,211,703'Signal transmission system'2001 6,208,525'Process for mounting electronic device and semiconductor device'2001 6,172,517'Signal transmitting device, circuit block and integrated circuit suited to fast signal transmission'2001 6,163,464'Apparatus for interconnecting logic boards'2000 6,069,793'Circuit module and information processing apparatus'2000 6,049,221'Semiconductor integrated circuit system having function of automatically adjusting output resistance value'2000 6,034,878'Source-clock-synchronized memory system and memory unit'2000 5,872,471'Simultaneous bidirectional transmission circuit'1999 5,867,541'Method and system for synchronizing data having skew'1999 5,852,365'Variable logic circuit and semiconductor integrated circuit using the same'1998 5,852,728'Uninterruptible clock supply apparatus for fault tolerant computer system'1998 5,818,253'Signal transmitting device, circuit block and integrated circuit suited to fast signal transmission'1998 5,802,390'Data bus circuit and method of changing over termination resistor of the data bus circuit'1998 5,794,020'Data transfer apparatus fetching reception data at maximum margin of timing'1998 5,787,261'Data transfer system, computer system and active-line inserted/withdrawn functional circuit board'1998 5,767,695'Fast transmission line implemented with receiver, driver, terminator and IC arrangements'1998 5,668,834'Signal transmitting device suitable for fast signal transmission including an arrangement to reduce signal amplitude in a second stage transmission line'1997 5,666,302'Simultaneous bidirectional transmission apparatus for transmitting and receiving differential signals'1997 5,627,481'Fast transmission line implemented with receiver, driver, terminator and IC arrangements'1997 5,621,774'Method and apparatus for synchronizing parallel data transfer'1997 5,568,063'Signal transmitting device, circuit block and integrated circuit suited to fast signal transmission'1996 5,548,226'Fast transmission line implemented with receiver, driver, terminator and IC arrangements'1996 5,504,924'Cooling system of electronic computer using flexible members in contact with semiconductor devices on boards'1996 5,497,263'Variable delay circuit and clock signal supply unit using the same'1996 5,452,436'System for connecting plurality of electronic units to data and clock buses wherein transmitting and receiving data in synchronization with transmitting and receiving clock signals'1995 5,428,503'Jet cooling apparatus for cooling electronic equipment and computer having the same mounted thereon'1995 5,365,402'Cooling apparatus of electronic device'1994 5,361,188'Cooling apparatus of electronic equipment'1994 5,315,482'Semiconductor apparatus of module installing type'1994 5,195,576'LSI cooling apparatus and computer cooling apparatus'1993 5,145,800'Method of wiring for power supply to large-scale integrated circuit'1992 5,087,829'High speed clock distribution system'1992 4,944,144'Spindle driving device of covering machine'1990 4,812,684'Multiphase clock distribution for VLSI chip'1989 4,516,039'Logic circuit utilizing a current switch circuit having a non-threshold transfer characteristic'1985 4,329,597'Logic circuit'1982 4,249,091'Logic circuit'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–2011Patents assigned to HITACHI LTD (53)· patent assignee history

1982–2004Based in Kanagawa, JP· patent location history

1989–2012Based in Hadano, JP· patent location history

1990Patents assigned to ISHIKAWA SEISAKUSHO KK (1)· patent assignee history

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

1998–2004Based in Naka-gun, JP· patent location history

2001–2004Patents assigned to HITACHI HOKKAI SEMICONDUCTOR (4)· patent assignee history

2001–2004Based in Suwa, JP· patent location history

2012Patents assigned to KURIHARA RYOICHI (1)· patent assignee history

2012Patents assigned to LG ELECTRONICS INC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	53	1981–2011
HITACHI HOKKAI SEMICONDUCTOR	4	2001–2004
ISHIKAWA SEISAKUSHO KK	1	1990
KURIHARA RYOICHI	1	2012
LG ELECTRONICS INC	1	2012

Locations

Location	Patents	Span
Hadano, JP	28	1989–2012
Kanagawa, JP	18	1982–2004
Suwa, JP	4	2001–2004
Oiso, JP	3	1997–2004
Naka-gun, JP	2	1998–2004