LexDanaLexDanabeta
Inventor

Hideyasu Umetsu

Inventor
Hitachi, JP

Overview

3→
Patents
1999–2000
Patent span
Electricity
Primary field (CPC H)

Patents· 3 as inventor

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

H02Mprimary
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems75%
Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications25%
PatentTitleYear
6,084,785'Electric power converter'20005,959,858'Electric power conversion apparatus'19995,892,674'Method and apparatus for power converting AC into DC or DC into AC by converter having common phase connection'1999

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1999–2000Patents assigned to HITACHI LTD (3)· patent assignee history
1999Patents assigned to HITACHI ENG CO LTD (1)· patent assignee history
1999–2000Based in Hitachi, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD31999–2000
HITACHI ENG CO LTD11999
Locations
LocationPatentsSpan
Hitachi, JP31999–2000