Inventor

Yoshiaki Chiba

Inventor

Hitachi, JP

Overview

2→

Patents

1990–1997

Patent span

Mechanical engineering

Primary field (CPC F)

Patents· 2 as inventor

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

F04Dprimary

F04DNon-positive-displacement pumps20%

F05CIndexing scheme relating to materials, material properties or material characteristics for machines, engines or pumps other than non-positive-displacement machines or engines20%

F16CShafts20%

G05DSystems for controlling or regulating non-electric variables20%

Y10TTechnical subjects covered by former us classification20%

PatentTitleYear

5,639,165'Method of operating pump and bearing device for pump'1997 4,915,349'Gas governor apparatus and gas piping system'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–1997Patents assigned to HITACHI LTD (2)· patent assignee history

1990–1997Based in Hitachi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	2	1990–1997

Locations

Location	Patents	Span
Hitachi, JP	2	1990–1997