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Inventor

Ryuji Takeda

Inventor
Tokyo, JP

Overview

11→
Patents
1998–2014
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 11 as inventor

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

F16Hprimary
F16HGearing25%
Y10TTechnical subjects covered by former us classification25%
G11BInformation storage based on relative movement between record carrier and transducer15%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h1015%
C30BSingle-crystal growth10%
F16CShafts10%
PatentTitleYear
8,642,449'Silicon wafer'20147,336,570'Apparatus and method for adjusting the tilt angle of an optical pickup device'20086,754,154'Optical disk driving apparatus, optical disk driving method and optical disk apparatus'20046,571,653'Ball screw'20036,341,103'Optical disk apparatus capable of correcting the drive current waveforms of stepping motor'20026,286,383'Ball screw device'20016,282,971'Ball screw'20016,276,225'Ball screw assembly'20016,089,117'Ball screw device'20006,054,373'Method of and apparatus for removing metallic impurities diffused in a semiconductor substrate'20005,788,763'Manufacturing method of a silicon wafer having a controlled BMD concentration'1998

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1998–2000Patents assigned to TOSHIBA CERAMICS CO (2)· patent assignee history
1998Based in Kanagawa, JP· patent location history
2000–2003Patents assigned to THK CO LTD (5)· patent assignee history
2000Patents assigned to PUREX CO LTD (1)· patent assignee history
2000–2008Based in Tokyo, JP· patent location history
2000Based in Shibata, JP· patent location history
2002–2008Patents assigned to SONY CORP (3)· patent assignee history
2014Patents assigned to GLOBALWAFERS JAPAN CO LTD (1)· patent assignee history
2014Based in Niigata, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
THK CO LTD52000–2003
SONY CORP32002–2008
TOSHIBA CERAMICS CO21998–2000
GLOBALWAFERS JAPAN CO LTD12014
PUREX CO LTD12000
Locations
LocationPatentsSpan
Tokyo, JP82000–2008
Niigata, JP12014
Shibata, JP12000
Kanagawa, JP11998