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Inventor

Keiki Fujita

Inventor
Tokyo, JP

Overview

2→
Patents
1978–2020
Patent span
Performing operations
Primary field (CPC B)

Patents· 2 as inventor

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

B60Lprimary
B60LPropulsion of electrically-propelled vehicles14%
B60MPower supply lines, and devices along rails, for electrically- propelled vehicles14%
B61LGuiding railway traffic14%
C22BProduction and refining of metals14%
G01NInvestigating or analysing materials by determining their chemical or physical properties14%
H02JElectric power networks14%
Y02TClimate change mitigation technologies related to transportation14%
PatentTitleYear
10,633,008DC-feeding-voltage calculating apparatus, DC-feeding-voltage control system, and DC-feeding-voltage calculating method20204,131,668'Iron ore pellet process control'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978Patents assigned to NIPPON STEEL CORP (1)· patent assignee history
1978Based in Himeji, JP· patent location history
2020Patents assigned to MITSUBISHI ELECTRIC CORP (1)· patent assignee history
2020Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MITSUBISHI ELECTRIC CORP12020
NIPPON STEEL CORP11978
Locations
LocationPatentsSpan
Tokyo, JP12020
Himeji, JP11978