Inventor

Tadao Karakama

Inventor

Kanagawa, JP

Overview

1985–2000

Patent span

Mechanical engineering

Primary field (CPC F)

Patents· 23 as inventor

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

F15Bprimary

F15BSystems acting by means of fluids in general33%

Y10TTechnical subjects covered by former us classification28%

E02FDredging25%

F16KValves5%

B62DMotor vehicles2%

F16LPipes2%

G05DSystems for controlling or regulating non-electric variables2%

G05GControl devices or systems insofar as characterised by mechanical features only2%

H01HElectric switches2%

PatentTitleYear

6,026,730'Flow control apparatus in a hydraulic circuit'2000 5,813,310'Working machine fall preventive valve apparatus'1998 5,692,427'Flow reinforcement directional control valve for a hydraulic circuit'1997 5,673,557'Displacement control system for variable displacement type hydraulic pump'1997 5,622,206'Multiple valve unit for pressurized fluid supply system'1997 5,558,127'Hydraulic pilot valve'1996 5,533,334'Pressurized fluid supply system'1996 5,481,872'Hydraulic circuit for operating plural actuators and its pressure compensating valve and maximum load pressure detector'1996 5,409,038'Hydraulic circuit including pressure compensating valve'1995 5,291,821'Hydraulic circuit for swivel working machine'1994 5,259,192'Hydraulic circuit system'1993 5,255,705'Hydraulic pressure control system'1993 5,253,672'Hydraulic pressure control system'1993 5,224,589'Operating lever device'1993 5,184,646'Pilot valve'1993 5,136,930'Apparatus for supplying pressure oil to hydraulic cylinders employed in working machines'1992 5,076,144'Poppet valve device'1991 5,056,415'Pilot operated control valve system performing a support function'1991 5,046,400'Control valve system'1991 5,040,565'Pilot operated control valve system'1991 4,984,603'Flow control valve assembly'1991 4,633,666'Integrated hydraulic system'1987 4,517,800'Hydraulic control system for off-highway self-propelled work machines'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985–2000Patents assigned to KOMATSU MFG CO LTD (23)· patent assignee history

1985–1997Based in Kawasaki, JP· patent location history

1991–2000Based in Kanagawa, JP· patent location history

1994–1996Based in Musashino, JP· patent location history

1996Based in Tokyo, JP· patent location history

1998Based in Tochigi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
KOMATSU MFG CO LTD	23	1985–2000

Locations

Location	Patents	Span
Kanagawa, JP	11	1991–2000
Kawasaki, JP	8	1985–1997
Musashino, JP	2	1994–1996
Tochigi, JP	1	1998
Tokyo, JP	1	1996