DK47651C
(en )
1933-08-14
Procedure for the production of colored cement or mortar.
DK44507C
(en )
1931-08-17
Procedure for the Production of Vanillin.
DK46155C
(en )
1932-09-05
Procedure for the production of lightweight concrete.
DK43621C
(en )
1931-01-26
Procedure for the manufacture of cement roof tiles.
ES120265A1
(en )
1930-11-16
PROCEDURE FOR THE MANUFACTURE OF BRICK SHINGLES
FR695453A
(en )
1930-12-17
Building brick
DK39553C
(en )
1928-12-03
Procedure for the manufacture of bricks or other bricks.
DK45352C
(en )
1932-03-07
Procedure for the Production of Cuprinitrate.
FR694131A
(en )
1930-11-28
Reinforced brick ceiling
DK48427C
(en )
1934-02-26
Process for the Preparation of 3-5-Dihalo-Pyridones.
FR39468E
(en )
1931-10-20
Building brick
DK47741C
(en )
1933-09-11
Procedure for the manufacture of cork molds.
DK45583C
(en )
1932-04-25
Method of Manufacturing Hydraulic Cement.
DK55967C
(en )
1939-03-20
Procedure for the manufacture of cement or concrete articles.
DK43966C
(en )
1931-04-07
Procedure for the Manufacture of Pavements.
DK44567C
(en )
1931-09-07
Procedure for the production of ready-to-use paints.
DK57871C
(en )
1940-08-05
Procedure for the production of lightweight concrete.
DK46211C
(en )
1932-09-19
Procedure for the Manufacture of Road Construction Materials.
DK49402C
(en )
1934-10-15
Procedure for the manufacture of plastics.
DK39747C
(en )
1929-01-28
Procedure for dyeing cement roof tiles or similar.
ES122476A3
(en )
1931-05-16
A procedure for the manufacture of marble-looking cement tiles.
DK47885C
(en )
1933-10-16
Procedure for the manufacture of peat or peat products.
ES117470A1
(en )
1930-06-16
Procedure for obtaining cold-enameled cement tiles.
DK38075C
(en )
1927-10-24
Procedure for the production of cement.
DK52255C
(en )
1936-10-05
Method of Making Cement.