FR637931A
(en )
1928-05-11
Chimney sweeper for steam generators
FR672498A
(en )
1929-12-28
Blower device for cleaning the tubes of steam boilers
FR701008A
(en )
1931-03-10
Floor cleaning device
FR582066A
(en )
1924-12-11
Device for cleaning boiler tubes
FR664513A
(en )
1929-09-04
Device for cleaning boilers
FR33770E
(en )
1929-03-04
Device for descaling boiler tubes
FR673766A
(en )
1930-01-20
Ejector-vacuum device, soot blower for the maintenance of steam boilers
FR32333E
(en )
1927-11-28
Device for descaling boiler tubes
FR31267E
(en )
1927-01-27
Device for cleaning boiler tubes
FR659527A
(en )
1929-06-29
Chimney sweeping device for steam boilers
FR621429A
(en )
1927-05-11
Steam boiler
FR663249A
(en )
1929-08-19
Extractor of the boiler tubes
FR819402A
(en )
1937-10-19
Device for cleaning boiler tubes
FR648934A
(en )
1928-12-15
Device for cleaning the interior of boiler tubes
FR604681A
(en )
1926-05-11
Device for descaling boiler tubes
FR685836A
(en )
1930-07-17
Air heater for steam boilers
FR613048A
(en )
1926-11-06
Device for descaling the outside of boiler tubes
FR649266A
(en )
1928-12-20
Device for cleaning flue pipes
FR40542E
(en )
1932-07-22
Steam heater for steam boilers
FR598756A
(en )
1925-12-24
Central heating tube bundle boiler
FR699277A
(en )
1931-02-12
Improvements to devices for cleaning the tubes of aquatubular boilers
FR593813A
(en )
1925-09-01
Automatic descaling device for steam boilers
FR676491A
(en )
1930-02-24
Blowing device for sandblasting and sweeping boiler tubes and the like
FR670935A
(en )
1929-12-06
Soot blower device for the maintenance of steam boilers
FR620938A
(en )
1927-05-02
Advanced device for sweeping boiler tubes