Inventor

Tsukasa Toyooka

Inventor

Ibaraki, JP

Overview

26→

Patents

1996–2013

Patent span

Fixed constructions

Primary field (CPC E)

Patents· 26 as inventor

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

E02Fprimary

E02FDredging35%

F15BSystems acting by means of fluids in general22%

B60KArrangement or mounting of propulsion units or of transmissions in vehicles6%

B60WConjoint control of vehicle sub-units of different type or different function6%

B60YIndexing scheme relating to aspects cross-cutting vehicle technology6%

F04BPositive-displacement machines for liquids6%

F16HGearing6%

B66FHoisting, lifting, hauling or pushing, not otherwise provided for, e.g. devices which apply a lifting or pushing force directly to the surface of a load4%

Y10TTechnical subjects covered by former us classification4%

B60LPropulsion of electrically-propelled vehicles2%

PatentTitleYear

8,585,156'Travel control device for work vehicle and work vehicle'2013 8,146,691'Travel drive system for work vehicle, work vehicle, and travel drive method'2012 7,712,565'HST travel system for working machine'2010 7,487,609'Hydraulic circuit device of hydraulic working machine'2009 7,272,928'Hydraulic circuit of construction machinery'2007 7,127,887'Oil pressure circuit for working machines'2006 7,114,591'Steering system for working truck'2006 7,076,947'Hydraulic circuit of construction machinery'2006 6,691,510'Pipe breakage control valve device'2004 6,619,037'Hydraulic driving device of civil engineering and construction machinery'2003 6,241,212'Hose rupture control valve unit'2001 6,220,028'Hydraulic drive system for hydraulic work vehicle'2001 6,212,886'Hydraulic drive system and directional control valve apparatus in hydraulic machine'2001 6,161,586'Tournament oil path constituting apparatus'2000 6,101,456'Output correcting method in control system, control system, and hydraulic pump control system'2000 5,974,796'Hydraulic circuit system for hydraulic working machine'1999 5,940,997'Hydraulic circuit system for hydraulic working machine'1999 5,930,996'Auto-acceleration system for prime mover of hydraulic construction machine and control system for prime mover and hydraulic pump'1999 5,911,506'Control system for prime mover and hydraulic pump of hydraulic construction machine'1999 5,907,951'Hydraulic control system for construction machine'1999 5,890,303'Hydraulic by-pass circuit for a hydraulic shovel'1999 5,848,531'Hydraulic drive system for construction machines'1998 5,829,252'Hydraulic system having tandem hydraulic function'1998 5,813,311'Hydraulic control system for hydraulic working machine'1998 5,673,558'Hydraulic circuit system for hydraulic excavator'1997 5,479,778'Hydraulic control system for construction machines'1996

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1996–2013Patents assigned to HITACHI CONSTRUCTION MACHINERY (25)· patent assignee history

1996–2010Based in Ibaraki, JP· patent location history

1999Based in Ibariki, JP· patent location history

2000–2009Based in Higashi-Ibaraki-gun, JP· patent location history

2012–2013Patents assigned to NAKAYAMA AKIRA (2)· patent assignee history

2012–2013Patents assigned to SUGAYA MAKOTO (2)· patent assignee history

2012–2013Patents assigned to TOYOOKA TSUKASA (2)· patent assignee history

2012–2013Patents assigned to UDAGAWA TSUTOMU (2)· patent assignee history

2012–2013Based in Omitama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI CONSTRUCTION MACHINERY	25	1996–2013
NAKAYAMA AKIRA	2	2012–2013
SUGAYA MAKOTO	2	2012–2013
TOYOOKA TSUKASAself	2	2012–2013
UDAGAWA TSUTOMU	2	2012–2013

Locations

Location	Patents	Span
Ibaraki, JP	18	1996–2010
Higashi-Ibaraki-gun, JP	5	2000–2009
Omitama, JP	2	2012–2013
Ibariki, JP	1	1999