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Inventor

Katsumi Onizuka

Inventor
Osaka, JP

Overview

2→
Patents
1985–1995
Patent span
Physics
Primary field (CPC G)

Patents· 2 as inventor

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

F16Kprimary
F16KValves25%
G01MTesting static or dynamic balance of machines or structures25%
G01NInvestigating or analysing materials by determining their chemical or physical properties25%
Y10TTechnical subjects covered by former us classification25%
PatentTitleYear
5,397,221'Valve operating mechanism'19954,502,323'Method and apparatus for performing a hydraulic pressure test on a tube'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985Patents assigned to YAMAMOTO SUIATSU KOGYOSHO KK (1)· patent assignee history
1985–1995Based in Osaka, JP· patent location history
1995Patents assigned to YAMAMOTO SUIATU KOGYOSHO CO LT (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
YAMAMOTO SUIATSU KOGYOSHO KK11985
YAMAMOTO SUIATU KOGYOSHO CO LT11995
Locations
LocationPatentsSpan
Osaka, JP21985–1995