CH74818A
(en )
1917-04-16
Rail storage on reinforced concrete sleepers
CH71670A
(en )
1916-02-01
Reinforced concrete sleeper for rails
ES65892A1
(en )
1918-01-16
Improvements in reinforced concrete sleepers for railways.
CH75851A
(en )
1918-02-16
Reinforced concrete railway sleeper
CH81272A
(en )
1919-10-16
Reinforced concrete railway sleeper
FI6921A
(en )
1918-01-17
Reinforced concrete sleeper
CH55697A
(en )
1912-09-02
Reinforced concrete railway sleeper
FR494155A
(en )
1919-09-02
Concrete foundation
ES66639A1
(en )
1918-04-16
Reinforced concrete railroad sleeper.
CH72601A
(en )
1916-06-02
Reinforced concrete railway sleeper
CH72920A
(en )
1917-01-02
Ballast bed edging on railways
FR488067A
(en )
1918-08-16
Reinforced concrete tank wagons
CH76896A
(en )
1918-06-17
Reinforced concrete sleeper for railway tracks
ES58541A1
(en )
1914-08-01
Reinforced concrete railway sleeper.
CH73069A
(en )
1916-08-16
Plate-shaped railroad track
ES65206A1
(en )
1917-09-16
A reinforced concrete sleeper for railways.
FR482788A
(en )
1917-04-26
Improvements to reinforced concrete railway sleepers
CH62083A
(en )
1913-11-01
Reinforced concrete sleeper
FR489519A
(en )
1919-02-14
Rail joints
FR427122A
(en )
1911-07-27
Reinforced concrete sleeper
FR433819A
(en )
1912-01-17
Reinforced concrete sleeper
AT68202B
(en )
1915-03-26
Reinforced concrete sleeper.
DK22139C
(en )
1917-05-21
Railway sleeper.
FR473240A
(en )
1915-01-06
Reinforced asphalt
CH76287A
(en )
1917-11-16
Reinforced concrete beam