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Inventor

Shosaku Tanaka

Inventor
Tottori, JP

Overview

3→
Patents
1988–2004
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.

G09Gprimary
G09GArrangements or circuits for control of indicating devices using static means to present variable information25%
H05BElectric heating25%
H10KOrganic electric solid-state devices25%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests25%
PatentTitleYear
6,753,834'Display device and driving method thereof'20046,107,734'Organic EL light emitting element with light emitting layers and intermediate conductive layer'20004,727,003'Electroluminescence device'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988Patents assigned to RICOH KK (1)· patent assignee history
1988Based in Totori, JP· patent location history
2000Patents assigned to IDEMITSU KOSAN CO (1)· patent assignee history
2000–2004Based in Tottori, JP· patent location history
2004Patents assigned to HITACHI LTD (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD12004
IDEMITSU KOSAN CO12000
RICOH KK11988
Locations
LocationPatentsSpan
Tottori, JP22000–2004
Totori, JP11988