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Inventor

Yukio Kitayama

Inventor
Oyama, JP

Overview

4→
Patents
1986–1990
Patent span
Performing operations
Primary field (CPC B)

Patents· 4 as inventor

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

B21Dprimary
B21DWorking or processing of sheet metal or metal tubes, rods or profiles without essentially removing material27%
Y10TTechnical subjects covered by former us classification27%
F28FDetails of heat-exchange and heat-transfer apparatus, of general application18%
B23PMetal-working not otherwise provided for9%
F28DHeat-exchange apparatus, not provided for in another subclass, in which the heat-exchange media do not come into direct contact9%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests9%
PatentTitleYear
4,898,232'Heat exchanger and process for producing the same'19904,698,904'Apparatus for assembling fins and tubes for heat exchangers'19874,597,171'Tube-enlarging press for use in heat exchanger fabrication'19864,593,756'Fin-and-tube type heat exchanger'1986

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1986–1990Patents assigned to HITACHI LTD (4)· patent assignee history
1986–1990Based in Oyama, JP· patent location history
1986Based in Tochigi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD41986–1990
Locations
LocationPatentsSpan
Oyama, JP31986–1990
Tochigi, JP11986