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Inventor

Graham H. Clarke

Inventor
Randfontein, ZA

Overview

3→
Patents
1994–1997
Patent span
Fixed constructions
Primary field (CPC E)

Patents· 3 as inventor

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

E21Dprimary
E21DShafts100%
PatentTitleYear
5,669,739'Prestressing of mine props'19975,547,317'Mine support system'19965,318,387'Yieldable load support'1994

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1994–1997Patents assigned to H L & H TIMBER PROD (3)· patent assignee history
1994Based in Boksburg, ZA· patent location history
1996Based in Transvaal, ZA· patent location history
1997Based in Randfontein, ZA· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
H L & H TIMBER PROD31994–1997
Locations
LocationPatentsSpan
Randfontein, ZA11997
Transvaal, ZA11996
Boksburg, ZA11994