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Inventor

Kazumasa Yuasa

Inventor
Tsuchiura, JP

Overview

3→
Patents
1990–2010
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 3 as inventor

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

F16Kprimary
F16KValves33%
F04BPositive-displacement machines for liquids17%
F05BIndexing scheme relating to wind, spring, weight, inertia or like motors, to machines or engines for liquids covered by subclasses f03b, f03d and f03g17%
F15BSystems acting by means of fluids in general17%
Y10TTechnical subjects covered by former us classification17%
PatentTitleYear
7,814,823'Feedback link for swash plate-type variable displacement hydraulic rotary machine'20105,140,815'Valve apparatus'19924,942,900'Pressure control valve'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–2010Patents assigned to HITACHI CONSTRUCTION MACHINERY (3)· patent assignee history
1990–2010Based in Tsuchiura, JP· patent location history
1992Based in Ibaraki, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI CONSTRUCTION MACHINERY31990–2010
Locations
LocationPatentsSpan
Tsuchiura, JP21990–2010
Ibaraki, JP11992