GB1119372A
(en )
1968-07-10
Improvements in or relating to photovoltaic cells
HK42081A
(en )
1981-08-28
Improvements in and relating to drains
CY863A
(en )
1976-12-17
Improvements in or relating to yeasts
IL36064A0
(en )
1971-03-24
Improvements in and relating to seats
ZA714674B
(en )
1972-05-31
Improvements in and relating to chairs
ZA716293B
(en )
1972-05-31
Improvements in and relating to chairs
ZA71146B
(en )
1971-10-27
Improvements in and relating to electrode boilers
IL36376A0
(en )
1971-05-26
Improvements in and relating to buildings
ZA734848B
(en )
1974-11-27
Improvements in and relating to heaters
ZA715416B
(en )
1973-03-28
Improvements in and relating to solar water heaters
ZA715026B
(en )
1972-05-31
Improvements in and relating to web-winding methods
AU464165B2
(en )
1975-08-04
Improvements in and relating to water heaters or boilers
AU488905B2
(en )
1976-06-24
Improvements in and relating to solar water heaters
ZA747313B
(en )
1975-12-31
Improvements in or relating to solar heating
MW3671A1
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1973-05-09
Improvements in and relating to solar water heaters
ZA712556B
(en )
1972-01-26
Improvements in or relating to pipes
ZA713342B
(en )
1972-01-26
Improvements in or relating to combination hot and cold water units
AU2952971A
(en )
1972-12-07
Improvements in water heaters
ZA721529B
(en )
1972-12-27
Improvements in or relating to solar water heaters
IE34543B1
(en )
1975-06-11
Improvements in and relating to heating installations
ZA704010B
(en )
1971-08-25
Improvements in solar heaters
ZA713651B
(en )
1972-01-26
Improvements in and relating to the tiling of roofs
ZA716648B
(en )
1973-02-28
Improvements in or relating to solar heating
IE36537B1
(en )
1976-11-24
Improvements in and relating to boilers
ZA711441B
(en )
1971-12-29
Improvements in or relating to water closets