Inventor

Yuzo Yamaguchi

Inventor

Tsuchiura, JP

Overview

31→

Patents

1981–2010

Patent span

Physics

Primary field (CPC G)

Patents· 31 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 transducer68%

A61KPreparations for medical, dental or toiletry purposes5%

A61PSpecific therapeutic activity of chemical compounds or medicinal preparations5%

A61QSpecific use of cosmetics or similar toiletry preparations5%

A01NPreservation of bodies of humans or animals or plants or parts thereof3%

A23GCocoa3%

C11BProducing, e.g. by pressing raw materials or by extraction from waste materials, refining or preserving fats, fatty substances, e.g. lanolin, fatty oils or waxes3%

F03BMachines or engines for liquids3%

F16CShafts3%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution3%

PatentTitleYear

7,643,245'Magnetic disc unit with gap between magnetic disc and shroud'2010 7,336,440'Magnetic disc unit with gap between magnetic disc and shroud'2008 7,330,334'Magnetic disk apparatus with shroud and having open space downstream of moveable arms in communication with bypass channel'2008 7,072,141'Magnetic disc unit with range of gap between disc and shroud'2006 6,898,049'Magnetic disk apparatus with air flow bypass channel'2005 6,751,050'Magnetic disc unit'2004 6,665,139'Magnetic-disc unit with gap between disc and shroud'2003 6,600,626'Magnetic disk apparatus'2003 5,658,584'Antimicrobial compositions with hinokitiol and citronellic acid'1997 5,390,059'Flying head slider supporting mechanism having active air pressure control'1995 5,251,083'Flying head slider and method of producing the same'1993 5,245,489'Guide arm with a fixed printed circuit board for magnetic disk drive'1993 5,243,482'Floating type magnetic head supporting assembly including a coupling to a slider side surface'1993 5,223,998'Magnetic head slider unit having a float slider and magnetic head mounted thereon for contact magnetic recording'1993 5,177,652'Dual-actuator transducer position control apparatus for seeking and following track on rotary disk'1993 5,140,482'Guide arm with affixed printed circuit board for magnetic disk drive'1992 5,136,438'Magnetic disk device having an auto-loading mechanism and a dust collecting mechanism'1992 5,128,821'Flying head slider and magnetic disk unit employing same'1992 5,107,383'Transducer supporting device for supporting a transducer in a rotary disk storage unit'1992 5,031,059'Rotating disk storage device with cooling gas flow control'1991 5,020,041'Magneto-optical memory apparatus having a floating magnetic head'1991 5,014,144'Magnetic head slider supporting apparatus'1991 5,012,359'Magnetic disk apparatus'1991 4,984,114'Flying head slider'1991 4,922,356'Transducer supporting apparatus and disk storage unit'1990 4,884,154'Flanged transducer supporting arm for a magnetic head/arm assembly'1989 4,814,906'Magnetic head slider'1989 4,723,186'Magnetic head support arm'1988 4,612,190'Growth inhibitor for cariogenic bacteria'1986 4,590,215'Growth inhibitor for cariogenic bacteria'1986 4,286,919'Apparatus for pumping operation of a hydraulic machine having Francis type runner'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–2005Patents assigned to HITACHI LTD (24)· patent assignee history

1981Based in Hitachi, JP· patent location history

1986–1997Patents assigned to TAKASAGO PERFUMERY CO LTD (3)· patent assignee history

1986–1997Based in Kanagawa, JP· patent location history

1988–1995Based in Tsuchiura, JP· patent location history

2003–2010Based in Shimonoseki, JP· patent location history

2006–2010Patents assigned to HITACHI GLOBAL STORAGE TECH (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	24	1981–2005
HITACHI GLOBAL STORAGE TECH	4	2006–2010
TAKASAGO PERFUMERY CO LTD	3	1986–1997

Locations

Location	Patents	Span
Tsuchiura, JP	19	1988–1995
Shimonoseki, JP	8	2003–2010
Kanagawa, JP	3	1986–1997
Hitachi, JP	1	1981