Inventor

Kooji Aizawa

Inventor

Hitachi, JP

Overview

4→

Patents

1991–1998

Patent span

Mechanical engineering

Primary field (CPC F)

Patents· 4 as inventor

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

F16Cprimary

F16CShafts36%

F04DNon-positive-displacement pumps27%

C23CCoating metallic material18%

F05BIndexing scheme relating to wind, spring, weight, inertia or like motors, to machines or engines for liquids covered by subclasses f03b, f03d and f03g18%

PatentTitleYear

5,839,880'Bearing unit, drainage pump and hydraulic turbine each incorporating the bearing unit, and method of manufacturing the bearing unit'1998 5,458,460'Drainage pump and a hydraulic turbine incorporating a bearing member, and a method of manufacturing the bearing member'1995 5,297,927'Vertical shaft type pump'1994 5,035,519'Submersible thrust bearing apparatus'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–1998Patents assigned to HITACHI LTD (4)· patent assignee history

1991–1998Based in Hitachi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	4	1991–1998

Locations

Location	Patents	Span
Hitachi, JP	4	1991–1998