Masakazu Haga

Person

Ibaraki, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Working apparatus for construction machine
- Patent number 6,564,480
- Issue date May 20, 2003
- Hitachi Construction Machinery Co., Ltd.
- Sadahisa Tomita
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Hydraulic circuit control device of construction machinery
- Patent number 6,430,490
- Issue date Aug 6, 2002
- Hitachi Construction Machinery Co., Ltd.
- Hiroshi Watanabe
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Device for controlling limited-area excavation with construction ma...
- Patent number 6,275,757
- Issue date Aug 14, 2001
- Hitachi Construction Machinery Co. Ltd.
- Hiroshi Watanabe
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Front control system, area setting method and control panel for con...
- Patent number 6,169,948
- Issue date Jan 2, 2001
- Hitachi Construction Machinery Co., Ltd.
- Kazuo Fujishima
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Slope excavation controller of hydraulic shovel, target slope setti...
- Patent number 6,076,029
- Issue date Jun 13, 2000
- Hitachi Construction Machinery Co., Ltd.
- Hiroshi Watanabe
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Front control system for construction machine
- Patent number 5,968,104
- Issue date Oct 19, 1999
- Hitachi Construction Machinery Co., Ltd.
- Eiji Egawa
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Excavation area setting system for area limiting excavation control...
- Patent number 5,960,378
- Issue date Sep 28, 1999
- Hitachi Construction Machinery Co., Ltd.
- Hiroshi Watanabe
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Interference preventing system for construction machine
- Patent number 5,957,989
- Issue date Sep 28, 1999
- Hitachi Construction Machinery Co. Ltd.
- Eiji Egawa
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Locus control system for construction machines
- Patent number 5,918,527
- Issue date Jul 6, 1999
- Hitachi Construction Machinery Co., Ltd.
- Masakazu Haga
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Front control system for construction machine and oil temperature i...
- Patent number 5,887,365
- Issue date Mar 30, 1999
- Hitachi Construction Machinery Co., Ltd.
- Kazuo Fujishima
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Region limiting excavation control system for construction machine
- Patent number 5,835,874
- Issue date Nov 10, 1998
- Hitachi Construction Machinery Co., Ltd.
- Toichi Hirata
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Work area limitation control system for construction machine
- Patent number 5,822,891
- Issue date Oct 20, 1998
- Hitachi Construction Machinery Co., Ltd.
- Kazuo Fujishima
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Area limiting excavation control system for construction machines
- Patent number 5,752,333
- Issue date May 19, 1998
- Hitachi Construction Machinery Co., Ltd.
- Takashi Nakagawa
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Area limiting excavation control system for construction machine
- Patent number 5,735,065
- Issue date Apr 7, 1998
- Hitachi Construction Machinery Co., Ltd.
- Eiji Yamagata
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Region limiting excavation control system for construction machine
- Patent number 5,701,691
- Issue date Dec 30, 1997
- Hitachi Construction Machinery Co., Ltd.
- Hiroshi Watanabe
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Hydraulic control system for construction machine
- Patent number 5,267,440
- Issue date Dec 7, 1993
- Hitachi Construction Machinery Co., Ltd.
- Kazunori Nakamura
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Prime mover rotational speed control system
- Patent number 5,265,569
- Issue date Nov 30, 1993
- Hitachi Construction Machinery Co., Ltd.
- Masaki Egashira
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Hydraulic drive system for construction machine
- Patent number 5,155,996
- Issue date Oct 20, 1992
- Hitachi Construction Machinery Co., Ltd.
- Akira Tatsumi
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Hydraulic driving method of and hydraulic driving apparatus for hyd...
- Patent number 5,074,194
- Issue date Dec 24, 1991
- Hitachi Construction Machinery Co., Ltd.
- Toichi Hirata
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Hydraulic drive system for civil engineering and construction machine
- Patent number 5,062,350
- Issue date Nov 5, 1991
- Hitachi Construction Machinery Co., Ltd.
- Hideaki Tanaka
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Engine remote control system
- Patent number 5,036,817
- Issue date Aug 6, 1991
- Hitachi Construction Machinery Co., Ltd.
- Osamu Tomikawa
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Drive control system for hydraulic machine
- Patent number 4,881,450
- Issue date Nov 21, 1989
- Hitachi Construction Machinery Co., Ltd.
- Toichi Hirata
- G05 - CONTROLLING REGULATING
Information Patent Grant
Control system for hydraulically-operated construction machinery
- Patent number 4,697,418
- Issue date Oct 6, 1987
- Hitachi Construction Machinery Co., Ltd.
- Nobuya Okabe
- B60 - VEHICLES IN GENERAL

Masakazu Haga

Person

Patents Grantslast 30 patents

Working apparatus for construction machine

Hydraulic circuit control device of construction machinery

Device for controlling limited-area excavation with construction ma...

Front control system, area setting method and control panel for con...

Slope excavation controller of hydraulic shovel, target slope setti...

Front control system for construction machine

Excavation area setting system for area limiting excavation control...

Interference preventing system for construction machine

Locus control system for construction machines

Front control system for construction machine and oil temperature i...

Region limiting excavation control system for construction machine

Work area limitation control system for construction machine

Area limiting excavation control system for construction machines

Area limiting excavation control system for construction machine

Region limiting excavation control system for construction machine

Hydraulic control system for construction machine

Prime mover rotational speed control system

Hydraulic drive system for construction machine

Hydraulic driving method of and hydraulic driving apparatus for hyd...

Hydraulic drive system for civil engineering and construction machine

Engine remote control system

Drive control system for hydraulic machine

Control system for hydraulically-operated construction machinery