GR2236B
(en )
1929-03-28
POWDER ABSORPTION DEVICE IN OR THE SEPARATION OF POWDER IS DONE WITH LIQUID.
FR692147A
(en )
1930-10-30
liquid purifier
FR683673A
(en )
1930-06-16
Timepiece
FR678458A
(en )
1930-03-24
Improvements in the construction of airplanes
ES115951A1
(en )
1930-01-01
IMPROVEMENTS IN THE COQUIFICATION OF AGGLOMERATES.
ES113915A2
(en )
1930-05-01
IMPROVEMENTS MADE IN THE PURPOSE OF SAID PATENT
FR679133A
(en )
1930-04-09
Improvements in the construction of airplanes
ES112372A1
(en )
1929-09-16
Improvements in the transmission of photographs.
ES111657A1
(en )
1929-05-01
Improvements in the mechanisms of speed changes.
ES113193A1
(en )
1929-07-16
Improvements in the preparation of diazotypes.
ES111860A1
(en )
1929-05-16
Improvements in the lighters of liquid or powder fuel.
ES113900A1
(en )
1929-08-16
Device to measure the speed and quantity of liquids and vapors.
FR695570A
(en )
1930-12-18
Liquid meter
FR701380A
(en )
1931-03-16
Device to facilitate payments with hard currency
FR671939A
(en )
1929-12-20
Device to facilitate the opening of envelopes
ES112640A1
(en )
1929-07-01
Improvements in and related to the manufacture of detonators.
CA286518A
(en )
1929-01-15
Liquid combustion device
CA292652A
(en )
1929-09-03
Liquid purifier
ES115998A1
(en )
1930-01-01
IMPROVEMENTS IN THE CARBURETORS.
ES116279A2
(en )
1930-02-01
IMPROVEMENTS MADE IN THE MAIN PATENT
ES116287A2
(en )
1930-02-01
IMPROVEMENTS MADE IN THE MAIN PATENT
FR708020A
(en )
1931-07-17
Improvements in the rolling of discs
GR2144B
(en )
1929-01-31
INSECTICID LIQUID.
DK43921C
(en )
1931-03-30
Liquid measuring device.
DK42164C
(en )
1930-05-05
Liquid measuring device.