Inventor

Hidetoshi Aizawa

Inventor

Hitachi, JP

Overview

1984–2002

Patent span

Electricity

Primary field (CPC H)

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 systems33%

H03KPulse technique27%

B41LApparatus or devices for manifolding, duplicating or printing for office or other commercial purposes13%

B41CProcesses for the manufacture or reproduction of printing surfaces7%

B65HHandling thin or filamentary material, e.g. sheets, webs, cables7%

G03GElectrography7%

Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications7%

PatentTitleYear

Assembled from patent assignee/location history and declaration credentials.

1984–2002Patents assigned to HITACHI LTD (5)· patent assignee history

1984–2002Based in Hitachi, JP· patent location history

1995Patents assigned to RICOH KK (1)· patent assignee history

1995Based in Shibata, JP· patent location history

2000–2001Patents assigned to TOHOKU RIKO KK (2)· patent assignee history

2000Based in Okawara, JP· patent location history

2001Based in Miyagi, JP· patent location history

2002Based in Tokai, JP· patent location history

Assignee and location history derived from the patent record.

Assignees

Locations