LexDanaLexDanabeta
Inventor

Ryota Doi

Inventor
Ibaraki, JP

Overview

5→
Patents
1980–2017
Patent span
Electricity
Primary field (CPC H)

Patents· 5 as inventor

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

H01Mprimary
H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy33%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution33%
G06FElectric digital data processing11%
G09GArrangements or circuits for control of indicating devices using static means to present variable information11%
H02KDynamo-electric machines11%
PatentTitleYear
9,851,887Display device and image transforming method20174,629,664'Liquid fuel cell'19864,588,660'Fuel cell'19864,537,840'Fuel cell using organic, high-molecular weight electrolyte'19854,217,514'Stator structure for induction motor'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980–1986Patents assigned to HITACHI LTD (4)· patent assignee history
1980Based in Naka-machi, JP· patent location history
1985Based in Naka, JP· patent location history
1986Based in Ibaraki, JP· patent location history
2017Patents assigned to NEC CORP (1)· patent assignee history
2017Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD41980–1986
NEC CORP12017
Locations
LocationPatentsSpan
Ibaraki, JP21986
Tokyo, JP12017
Naka, JP11985
Naka-machi, JP11980