FR1304454A
(en )
1962-09-21
Improvements to catalytic combustion heaters
BE619597A
(en )
1962-10-15
Improvements to heating devices
BE611936A
(en )
1962-06-22
Improvements to space heaters
FR1190472A
(en )
1959-10-13
Improvements to heating devices
FR1175570A
(en )
1959-03-27
Improvements to catalytic heaters
FR1306576A
(en )
1962-10-13
Improvements to heating devices
FR1296861A
(en )
1962-06-22
Improvements to space heaters
FR1147292A
(en )
1957-11-21
Improvements to heating devices
FR1130042A
(en )
1957-01-30
Improvements to unit heaters
BE584917A
(en )
1960-03-16
Improvements to electric heaters.
FR74820E
(en )
1961-03-03
Improvements to heating devices
FR1174982A
(en )
1959-03-18
Improvements to water heaters
FR1174310A
(en )
1959-03-10
Improvements to mixed heaters
FR1199420A
(en )
1959-12-14
Vertical heater
FR1201596A
(en )
1960-01-04
Improvements to central heating installations
FR1271203A
(en )
1961-09-08
Improvements to heating devices
FR1270622A
(en )
1961-09-01
Improvements to heating devices
FR1265245A
(en )
1961-06-30
Improvements to heating devices
FR1241489A
(en )
1960-09-16
Improvements to electric heating devices
FR1180233A
(en )
1959-06-02
Improvement in heating devices
FR1240233A
(en )
1960-09-02
Improvements to central heating radiators
FR1097874A
(en )
1955-07-12
Improvements to portable heaters
FR1250780A
(en )
1961-01-13
Improvements made to oil-burning heaters
FR1147259A
(en )
1957-11-21
Improvements to high-frequency heaters
FR1255909A
(en )
1961-03-17
Improvements to fluid heaters