Application Type
National Patents
Application SubType
National Patent
(10) Registration Number and Date
1917/000008 1920.11.17
Status
Invalidated
(180) Expiration Date
1991.07.06
(20) Filing Number and Date
BW P/1917/000008 1971.07.06
(40) Publication Number and Date
(85) National Entry Date
(30) Priority Details
(71/73) Applicant
(72) Inventor
(74) Representative Name
(EN) SPOOR & FISHER : P. O. Box 454
(54) Title
(EN) IMPROVEMENTS IN CONCRETE PIPES, COLUMNS, CIRDERS, BLOCKS, AND OTHER STRUCTURAL MATERIAL, AND METHOD OF AND MEANS FOR MANUFACTURING THE SAME
(57) Abstract
(58) Citations