GR2703B
(en )
1930-04-02
IMPROVEMENTS IN THE METHODS OF DISTILLERS OF DYEING OIL OF LIGNITE OIL AND SIMILAR ASPHALT MATERIALS.
FR41743E
(en )
1933-03-29
Improvements in dielectric materials
ES115709A1
(en )
1929-12-16
Improvements in the apparatus for the carbonization of coal and similar materials.
GR3027B
(en )
1930-12-11
HOW TO DECOLARIZE AND DEVICE SUCH DRY SULTANS.
ES113414A1
(en )
1929-08-01
Improvements in the construction of roads and roads.
GR2724B
(en )
1930-04-28
IMPROVEMENT IN MATERIAL REPLACEMENT OF CEMENT, IRON AND WOOD.
ES117689A1
(en )
1930-05-01
Improvements in the construction of foundations or foundations for posts and similar.
ES119005A1
(en )
1930-08-16
Improvements in mixing drums for concrete and similar applications.
ES111598A1
(en )
1929-05-01
Perfeccionamientos in machines for the laying and settlement of railroads.
FR39960E
(en )
1932-03-21
Improvements in friction materials
GR2428B
(en )
1929-08-27
PERFECTIONS IN AND IN RELATION TO ASPHALT COMPOSITIONS.
ES109007A1
(en )
1928-10-01
Improvements in the construction of roads and similar.
ES112761A1
(en )
1929-07-01
Improvements in the classifying devices for beams and other materials.
ES120966A1
(en )
1931-01-01
IMPROVEMENTS INTRODUCED IN THE DISTILLATION OF LIGNITE AND SIMILAR MATERIALS
GR2206B
(en )
1929-03-11
IMPROVEMENTS IN THOUGHT NUMBERED FOR TACHYMETRIC AND TOPOGRAPHIC WORK.
GR2700B
(en )
1930-03-31
OFFICE TYPE WITH CYLINDER CYLINDER CAPACITY OF THE USUAL TYPE AND DIMENSIONS OF SUCH.
ES125480A3
(en )
1932-05-16
Improvements in the construction of road pavements and the like.
ES120244A3
(en )
1930-12-01
An automatic scale for people and goods.
ES127405A1
(en )
1932-08-16
Improvements in the paving of roads, roads, floors and similar.
ES117229A1
(en )
1930-04-01
Improvements in bituminous pavements.
GR7205B
(en )
1938-03-10
PERFECTIONS IN METHODS AND DEVICE FOR THE EXPORT OF CELLULAR FIBERS FROM HERBAL MATERIALS.
ES117809A3
(en )
1930-05-16
Improvements in umbrellas and umbrellas with cases.
ES121210A1
(en )
1931-02-01
Improvements in the cards and similar.
ES115831A1
(en )
1929-12-16
Improvements in the facilities for the carbonization of coal and similar materials.
GR3230B
(en )
1931-06-09
OIL PIPELINE AND OIL PRESS CONTINUOUS WORK.