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Inventor

Hidekazu Tokushima

Inventor
Kashiwa, JP

Overview

12→
Patents
1997–2018
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 12 as inventor

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

F16Cprimary
F16CShafts41%
B22FWorking metallic powder14%
C22CAlloys14%
H02KDynamo-electric machines14%
G11BInformation storage based on relative movement between record carrier and transducer7%
C21DModifying the physical structure of ferrous metals3%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests3%
Y10TTechnical subjects covered by former us classification3%
PatentTitleYear
10,150,162Iron-based sintered alloy for sliding member and production method therefor20189,637,811'Iron-based sintered sliding member and production method therefor'20179,631,669'Oil-impregnated sintered bearing and production method therefor'20179,441,286'Oil-impregnated sintered bearing and production method therefor'20169,404,535'Sliding bearing assembly'20166,851,859'Bearing unit, production method therefor and spindle motor'20056,822,358'Spindle motor and manufacture thereof'20046,756,715'Spindle motor'20046,737,016'Process for manufacturing sintered slide bearing'20045,834,870'Oil impregnated porous bearing units and motors provided with same'19985,821,655'Magnetic fluid bearing unit structure and motor having the same'19985,645,355'Bearing unit'1997

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1997–2017Patents assigned to HITACHI POWDERED METALS (8)· patent assignee history
1997–2004Patents assigned to HITACHI LTD (4)· patent assignee history
1997–1998Based in Matsudo, JP· patent location history
2004–2005Patents assigned to MINEBEA CO LTD (2)· patent assignee history
2004–2018Based in Kashiwa, JP· patent location history
2004Based in Chiba, JP· patent location history
2016–2018Patents assigned to HITACHI CHEMICAL CO LTD (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI POWDERED METALS81997–2017
HITACHI LTD41997–2004
HITACHI CHEMICAL CO LTD32016–2018
MINEBEA CO LTD22004–2005
Locations
LocationPatentsSpan
Kashiwa, JP82004–2018
Matsudo, JP31997–1998
Chiba, JP12004