ZA718143B
(en )
1972-08-30
Improvements in or relating to pipe fittings
ZA734073B
(en )
1974-08-28
Improvements in concrete pipes
ZA733375B
(en )
1975-01-29
Improvements in or relating to concrete pipes
ZA722898B
(en )
1973-06-27
Improvements in or relating to pipes
ZA713261B
(en )
1972-01-26
Improvements in or relating to structural members
ZA706996B
(en )
1972-05-31
Improvements in or relating to the prestressing of concrete structures
ZA713426B
(en )
1972-01-26
Improvements in or relating to a pipe connection
ZA717287B
(en )
1972-08-30
Improvements in concrete pipes and the like
KE2678A
(en )
1976-12-10
Improvements in or relating to pipes
ZA716391B
(en )
1973-06-27
Improvements in or relating to glassfibre reinforced cementitious composite materials
ZA712556B
(en )
1972-01-26
Improvements in or relating to pipes
HK46177A
(en )
1977-09-16
Improvements in or relating to building construction
ZA703969B
(en )
1971-10-27
Improvements in or relating to reinforced concrete pipes
ZA712672B
(en )
1972-01-26
Improvements in or relating to pipe couplings
ZA71212B
(en )
1971-10-27
Improvements in or relating to prefabricated buildings
ZA71761B
(en )
1971-10-27
Improvements in or relating to buildings
ZA724648B
(en )
1973-04-25
Improvements in or relating to pipes
ZA705556B
(en )
1972-02-23
Improvements in or relating to pipe joints
ZA70778B
(en )
1971-05-27
Improvements in or relating to building construction
ZA701107B
(en )
1971-05-27
Improvements in or relating to building blocks
ZA701090B
(en )
1971-05-27
Improvements in or relating to building blocks
AU421009B2
(en )
1972-02-02
Improvements in and relating to concrete or like pipes
ZM5570A1
(en )
1972-08-21
Improvements in or relating to concrete casting
AU450819B2
(en )
1972-10-05
Improvements in or relating to reinforcements for concrete
ZA72322B
(en )
1972-11-29
Improvements in or relating to concrete