US1336951A
(en )
1920-04-13
Automobile-reflector dimmer
GB154024A
(en )
1920-11-25
An improvement in bricks for building purposes
FR494965A
(en )
1919-09-25
Improvements to ovens
GB155366A
(en )
1920-12-16
Improvements connected with tiles
CH81575A
(en )
1919-09-16
Heating method and furnace for its implementation
AU1305619B
(en )
1920-08-03
Improvements in furnace control
GB153784A
(en )
1920-11-18
Improvements in roofing and other tiles
AU1326219B
(en )
1920-05-25
Improvements in open hearth furnaces
FR526261A
(en )
1921-10-06
Brick
CH81730A
(en )
1919-07-01
Brick
FR535847A
(en )
1922-04-21
Method and apparatus for the production of pulverized fuel
SU25018A1
(en )
1932-01-31
Apparatus for automatic distribution of gases in air-heaters of blast furnaces
DK26036C
(en )
1920-05-31
Apparatus for Examining the Condition of Combustion Products in Furnaces.
FR557960A
(en )
1923-08-20
Improvements to combustion chambers for furnaces and boilers heated with spray fuels
FR513199A
(en )
1921-02-09
Improvement in removable chains
CH82444A
(en )
1919-10-01
Apparatus for lowering coffins
AU1098219B
(en )
1919-07-28
Improvements in or relating to heating apparatus
FR535445A
(en )
1922-04-14
Ovens
FR499092A
(en )
1920-01-30
Ovens
FR525454A
(en )
1921-09-22
Improvements to metallurgical furnaces
FR519428A
(en )
1921-06-09
Improvements to continuous and intermittent furnaces
FR513078A
(en )
1921-02-07
Continuous furnace improvements
AU1535720B
(en )
1922-02-07
Method and means for obtaining glass froma furnace
FR496162A
(en )
1919-10-29
Advanced lighter
FR507833A
(en )
1920-09-24
Advanced lighter