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Inventor

Hiroki Tonai

Inventor
Yokohama, JP

Overview

3→
Patents
2002–2004
Patent span
Chemistry
Primary field (CPC C)

Patents· 3 as inventor

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

C04Bprimary
C04BLime, magnesia43%
F16CShafts43%
Y10TTechnical subjects covered by former us classification14%
PatentTitleYear
6,784,131'Silicon nitride wear resistant member and method of manufacturing the member'20046,485,830'Material for ceramic ball and method of manufacturing ceramic ball'20026,475,940'Wear resistant member for electronic equipment and bearing and spindle motor therewith'2002

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2002–2004Patents assigned to TOSHIBA KK (3)· patent assignee history
2002–2004Based in Yokohama, JP· patent location history
2002Based in Kanagawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TOSHIBA KK32002–2004
Locations
LocationPatentsSpan
Yokohama, JP22002–2004
Kanagawa, JP12002