ZA733315B
(en )
1974-04-24
Improvements in or relating to connection elements
ZA731896B
(en )
1974-05-29
Improvements in or relating to ozonisers
ZA735671B
(en )
1974-09-25
Improvements in or relating to electrical heating elements
ZA722898B
(en )
1973-06-27
Improvements in or relating to pipes
ZA732706B
(en )
1974-11-27
Improvements in or relating to electrical heaters
ZA747313B
(en )
1975-12-31
Improvements in or relating to solar heating
ZA734848B
(en )
1974-11-27
Improvements in and relating to heaters
ZA721529B
(en )
1972-12-27
Improvements in or relating to solar water heaters
AU464165B2
(en )
1975-08-04
Improvements in and relating to water heaters or boilers
AU2952971A
(en )
1972-12-07
Improvements in water heaters
CY891A
(en )
1977-03-18
Improvements in or relating to tanks
ZA715416B
(en )
1973-03-28
Improvements in and relating to solar water heaters
MW3671A1
(en )
1973-05-09
Improvements in and relating to solar water heaters
AU1496670A
(en )
1971-11-18
Improvements in or relating to water heaters
AU5176869A
(en )
1970-09-17
Improvements in or relating to water heaters
ZA716648B
(en )
1973-02-28
Improvements in or relating to solar heating
ZA727732B
(en )
1974-04-24
Improvements in or relating to geysers
AU473409B2
(en )
1976-06-24
Improvements in or relating to heaters
AU7187674A
(en )
1976-02-05
Solar water heater
ZA71164B
(en )
1972-05-31
Improvements in water heaters
ZA738160B
(en )
1975-02-26
Improvements in or relating to heaters
ZA728851B
(en )
1974-02-27
Improvements in or relating to windmills
ZA72620B
(en )
1973-03-28
Improvements in or relating to heating devices
AU471036B2
(en )
1976-04-08
Improvements in or relating to water tube boilers
IE36495B1
(en )
1976-11-24
Improvements in or relating to electrolysers