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Inventor

Toshihiko Tutumi

Inventor
Yokohama, JP

Overview

2→
Patents
1988–1991
Patent span
Chemistry
Primary field (CPC C)

Patents· 2 as inventor

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

B01Dprimary
B01DSeparation17%
C02FTreatment of water, waste water, sewage, or sludge17%
C08LCompositions of macromolecular compounds17%
F16CShafts17%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests17%
Y10TTechnical subjects covered by former us classification17%
PatentTitleYear
5,039,575'Single body and composite sliding members'19914,784,772'Method for the production and use of ultrapure water and apparatus therefor'1988

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1988Patents assigned to MITSUI TOATSU CHEMICALS (1)· patent assignee history
1988–1991Based in Yokohama, JP· patent location history
1991Patents assigned to DAIDO METAL CO (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DAIDO METAL CO11991
MITSUI TOATSU CHEMICALS11988
Locations
LocationPatentsSpan
Yokohama, JP21988–1991