HK7279A
(en )
1979-02-16
Improvements in and relating to pipe cutters
ZA72290B
(en )
1972-09-27
Improvements in or relating to pipe couplings
ZA725074B
(en )
1973-04-25
Improvements in and relating to locks
ZA727656B
(en )
1973-07-25
Improvements in or relating to interlocking stones and the like
ZA733375B
(en )
1975-01-29
Improvements in or relating to concrete pipes
ZA717287B
(en )
1972-08-30
Improvements in concrete pipes and the like
ZA729105B
(en )
1973-09-26
Improvements in or relating to mortars and the like
KE2678A
(en )
1976-12-10
Improvements in or relating to pipes
IE36575B1
(en )
1976-12-08
Improvements in or relating to pipe joints
ZA732327B
(en )
1974-02-27
Improvements in and relating to the manufacture of concrete pipes
ZA721087B
(en )
1972-11-29
Improvements in concrete pipes and the like
ZA715760B
(en )
1972-05-31
Improvements in and relating to concrete or like pipes
ZA724648B
(en )
1973-04-25
Improvements in or relating to pipes
ZA738623B
(en )
1975-04-30
Improvements in and relating to structures
ZA712556B
(en )
1972-01-26
Improvements in or relating to pipes
ZA728010B
(en )
1973-07-25
Improvements in and relating to tiles
ZA722741B
(en )
1973-01-31
Improvements in or relating to building construction
AU421009B2
(en )
1972-02-02
Improvements in and relating to concrete or like pipes
ZA718082B
(en )
1973-03-28
Improvements in or relating to the casting of concrete of the like
ZA711485B
(en )
1971-11-24
Improvements in and relating to concrete elements and the production thereof
AU445089B2
(en )
1974-01-29
Improvements in and relating to pipes
AU5410873A
(en )
1974-10-10
Improvements in and relating to the manufacture of concrete pipes
AU463138B2
(en )
1975-07-17
Improvements in concrete pipes andthe like
ZA711944B
(en )
1972-05-31
Improvements in or relating to pipe joints
ZA715888B
(en )
1972-11-29
Improvements in or relating to building construction