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Inventor

Tetsunobu Okamura

Inventor
Ohira, JP

Overview

4→
Patents
1993–2007
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.

F24Dprimary
F24DDomestic- or space-heating systems, e.g. central heating systems30%
F25BRefrigeration machines, plants or systems30%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications30%
F24FAir-conditioning10%
PatentTitleYear
7,234,646'Heat pump hot-water supply system'20076,874,694'Heat pump hot-water supply system'20056,837,443'Heat pump hot-water supply system'20055,197,293'Method of controlling an air conditioning apparatus and air conditioning apparatus using the method'1993

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1993–2005Patents assigned to HITACHI LTD (3)· patent assignee history
1993Based in Tochigi, JP· patent location history
2005–2007Based in Ohira, JP· patent location history
2007Patents assigned to HITACHI APPLIANCES INC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD31993–2005
HITACHI APPLIANCES INC12007
Locations
LocationPatentsSpan
Ohira, JP32005–2007
Tochigi, JP11993