CH82856A
(en )
1919-11-01
Plug-in contact with contact members that can move in the transverse direction to one another
ES71336A1
(en )
1919-12-31
Improvements in teleautographic devices.
ES69344A1
(en )
1919-04-16
Improvements in heating devices.
ES70896A1
(en )
1919-11-01
Improvements in and related to electric lights.
ES70722A1
(en )
1919-10-16
Improvements in salakoffs.
FI7823A
(en )
1919-12-12
The device in the shears
ES71711A1
(en )
1920-03-01
Improvements in evaporator devices.
ES69140A1
(en )
1919-03-16
Improvements in the valves.
ES71822A1
(en )
1920-03-01
Improvements in water-tubular boilers.
ES71022A1
(en )
1919-11-16
Improvements in electric lamps.
FR518791A
(en )
1921-05-31
Improvements in electric locomotives
ES70434A1
(en )
1919-09-01
Improvements in airplanes.
ES71817A3
(en )
1920-03-01
Improvements in electric traction cars.
ES69581A1
(en )
1919-05-16
Improvements in endless conveyors.
ES72521A1
(en )
1920-04-28
Improvements in light railways.
ES81628A1
(en )
1922-10-16
Procedure to produce zinc in the electric furnace.
ES73759A1
(en )
1920-08-16
Improvements in reduction gears.
ES69940A1
(en )
1919-07-01
Improvements in wrenches.
ES71862A1
(en )
1920-03-16
Improvements in electric heaters.
ES69615A1
(en )
1919-05-16
Improvements in mermaids.
ES79059A1
(en )
1921-10-16
Improvements in conveyors.
ES74924A1
(en )
1920-12-01
Improvements in power installations of the continuous combustion type.
ES70727A1
(en )
1919-10-16
Improvements and modifications in cinematographic devices.
ES75948A1
(en )
1921-01-16
Improvements in the sorbeteras.
ES72882A1
(en )
1920-05-25
Improvements in gasoline production.