Inventor

Katsumi Matsubara

Inventor

Ushiku, JP

Overview

11→

Patents

1979–2001

Patent span

Mechanical engineering

Primary field (CPC F)

Patents· 11 as inventor

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

F04Cprimary

F04CRotary-piston, or oscillating-piston, positive-displacement machines for liquids28%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests14%

F01CRotary-piston or oscillating-piston machines or engines10%

B29CShaping or joining of plastics7%

F05CIndexing scheme relating to materials, material properties or material characteristics for machines, engines or pumps other than non-positive-displacement machines or engines7%

F24FAir-conditioning7%

F28DHeat-exchange apparatus, not provided for in another subclass, in which the heat-exchange media do not come into direct contact7%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution7%

Y10TTechnical subjects covered by former us classification7%

F16CShafts3%

PatentTitleYear

6,253,567'Ice thermal storage type air conditioner and ice thermal storage tank'2001 6,101,837'Ice thermal storage type air-conditioner and ice thermal storage tank'2000 5,314,321'Screw-type rotary fluid machine including rotors having treated surfaces'1994 5,223,052'Method of treating surfaces of rotors of the screw type rotary machine'1993 4,984,974'Screw type vacuum pump with introduced inert gas'1991 4,773,835'Scroll type pump with wrap curve offset for thermal expansion'1988 4,714,418'Screw type vacuum pump'1987 4,664,601'Operation control system of rotary displacement type vacuum pump'1987 4,557,679'Rotary fluid machine with thrust bearing mounting unit'1985 4,234,296'Screw compressor'1980 4,174,196'Screw fluid machine'1979

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1979–2001Patents assigned to HITACHI LTD (11)· patent assignee history

1979–1987Based in Ibaraki, JP· patent location history

1980Based in Shimizu, JP· patent location history

1985Based in Usaiku, JP· patent location history

1988Patents assigned to SHIN MEIWA IND CO LTD (1)· patent assignee history

1988–2001Based in Ushiku, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	11	1979–2001
SHIN MEIWA IND CO LTD	1	1988

Locations

Location	Patents	Span
Ushiku, JP	6	1988–2001
Ibaraki, JP	3	1979–1987
Usaiku, JP	1	1985
Shimizu, JP	1	1980