CH64874A
(en )
1914-05-01
Hollow railway sleeper made of iron-reinforced concrete
CH51768A
(en )
1911-09-16
Railway sleeper made of iron-reinforced concrete with rail fasteners
CH55697A
(en )
1912-09-02
Reinforced concrete railway sleeper
DK15809C
(en )
1912-04-01
Railway sleeper of reinforced concrete.
CH64217A
(en )
1914-03-16
Tie ties
FR421450A
(en )
1911-02-22
Cement railway sleeper
CH71432A
(en )
1916-01-03
Process for the production of railway sleepers from reinforced concrete
FR472707A
(en )
1914-12-16
Reinforced concrete hollow railway sleeper
FR431574A
(en )
1911-11-14
Reinforced cement railway sleepers
FR473317A
(en )
1915-01-08
Improvements to the suspension of the sleeper sleepers of the bogies
CH37979A
(en )
1907-10-15
Iron-reinforced concrete railway sleeper
CH59656A
(en )
1913-06-02
Tie ties
CH72601A
(en )
1916-06-02
Reinforced concrete railway sleeper
FR427122A
(en )
1911-07-27
Reinforced concrete sleeper
FR433819A
(en )
1912-01-17
Reinforced concrete sleeper
FR457175A
(en )
1913-09-13
Reinforced concrete railway sleeper
CH62083A
(en )
1913-11-01
Reinforced concrete sleeper
FR521294A
(en )
1921-07-09
Improvements made to the construction of reinforced concrete railway sleepers
FR418951A
(en )
1910-12-23
Railroad sleepers
FR434539A
(en )
1912-02-06
Improvements to concrete sleepers for railway tracks
CH63287A
(en )
1914-01-16
Hollow cement stone
FR416900A
(en )
1910-10-31
Reinforced cement concrete railway sleeper
CH61354A
(en )
1913-09-16
Reinforced concrete sleeper for the superstructure of trams and other railways
FR430812A
(en )
1911-10-25
Reinforced concrete sleeper
FR423389A
(en )
1911-04-14
Reinforced concrete sleeper