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Inventor

Seizou Doi

Inventor
Tsuchiura, JP

Overview

2→
Patents
1998–2021
Patent span
Physics
Primary field (CPC G)

Patents· 2 as inventor

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

C30Bprimary
C30BSingle-crystal growth17%
E02FDredging17%
G06FElectric digital data processing17%
G07CTime or attendance registers17%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests17%
Y10TTechnical subjects covered by former us classification17%
PatentTitleYear
11,015,321Operational data storage device20215,746,829'Impurity concentrator and analyzer'1998

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1998Patents assigned to TOSHIBA KK (1)· patent assignee history
1998Based in Tokyo, JP· patent location history
2021Patents assigned to HITACHI CONSTRUCTION MACH CO (1)· patent assignee history
2021Based in Tsuchiura, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI CONSTRUCTION MACH CO12021
TOSHIBA KK11998
Locations
LocationPatentsSpan
Tsuchiura, JP12021
Tokyo, JP11998