LexDanaLexDanabeta
Inventor

Shuji Tsukamoto

Inventor
Tokyo, JP

Overview

3→
Patents
1985–2007
Patent span
Human necessities
Primary field (CPC A)

Patents· 3 as inventor

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

G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer50%
A61KPreparations for medical, dental or toiletry purposes25%
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations25%
PatentTitleYear
7,167,439'Multilevel optical recording medium with calibration signals'20076,028,836'Optical recording medium for use at short wavelengths and its recording method'20004,491,594'Method for treatment of seizures'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985Patents assigned to EISAI CO LTD (1)· patent assignee history
1985Based in Okayama, JP· patent location history
2000–2007Patents assigned to TDK CORP (2)· patent assignee history
2000Based in Nagano, JP· patent location history
2007Based in Tokyo, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TDK CORP22000–2007
EISAI CO LTD11985
Locations
LocationPatentsSpan
Tokyo, JP12007
Nagano, JP12000
Okayama, JP11985