DK34626C
(en )
1925-06-22
Device for the construction of insulated air gaps with concrete or similar walls.
CH121051A
(en )
1927-06-16
Slotted insert rail for concrete structures.
FR656797A
(en )
1929-05-13
Brick refinements
FR636842A
(en )
1928-04-17
Brick or building element
DK27083C
(en )
1921-01-10
Procedure for the manufacture of cheap walls of clay or concrete.
FR686203A
(en )
1930-07-23
Building brick
FR695453A
(en )
1930-12-17
Building brick
ES88926A1
(en )
1924-05-01
Procedure for the construction of concrete streets.
FR620308A
(en )
1927-04-20
Building construction
DK34114C
(en )
1925-02-09
Concrete building board.
ES101373A1
(en )
1927-03-01
An improved procedure for the construction of concrete piles.
FR585035A
(en )
1925-02-19
Brick for ceilings
FR638597A
(en )
1928-05-29
Hollow brick masonry
ES90552A1
(en )
1925-01-16
Construction system for concrete ceilings.
ES116342A3
(en )
1930-02-01
PROCEDURE FOR THE CONSTRUCTION OF CONCRETE CEILINGS
FR621132A
(en )
1927-05-05
Concrete construction
SE65736C1
(en )
1928-08-07
Roofing slabs
DK33205C
(en )
1924-05-12
Procedure for casting moldings of magnesia cement or the like.
DK35526C
(en )
1926-01-25
Cement building stone.
ES110028A2
(en )
1929-02-16
Establishment of the tracks on centrifuged concrete sleepers.
FR633435A
(en )
1928-01-28
Building material
FR657219A
(en )
1929-05-18
Improvements to roofing systems for buildings
ES89369A3
(en )
1925-04-01
A procedure for the construction of cast concrete buildings.
ES96811A1
(en )
1926-04-01
System of plaster pieces for the construction of ceilings.
FR633702A
(en )
1928-02-02
building element