CH19809A
(en )
1900-09-30
Reinforced concrete sleeper for railway tracks
FR322856A
(en )
1903-02-17
Reinforced cement sleeper for railway tracks
FR4567E
(en )
1905-08-29
Reinforced cement sleeper for railway tracks
FR333874A
(en )
1903-12-05
Reinforced cement sleeper for railway tracks
FR318558A
(en )
1902-10-18
Reinforced cement sleepers for railway tracks
FR351956A
(en )
1905-07-31
Hollow sleeper in reinforced cement concrete for railway tracks
FR348865A
(en )
1905-05-01
Reinforced concrete sleeper for railways
FR389510A
(en )
1908-09-11
Reinforced concrete sleeper for railway tracks
FR324120A
(en )
1903-03-24
New reinforced concrete sleeper system for railway tracks
CH42143A
(en )
1909-01-02
Reinforced concrete sleeper for railway tracks
FR388556A
(en )
1908-08-17
Reinforced concrete sleeper for railway tracks
FR347076A
(en )
1905-02-23
Reinforced concrete bushing for railway tracks
FR4964E
(en )
1905-11-25
Reinforced concrete bushing for railway tracks
FR10564E
(en )
1909-07-30
Reinforced concrete sleeper for railway tracks
FR382125A
(en )
1908-01-30
Reinforced cement concrete sleeper ss tem for railways
FR332599A
(en )
1903-10-31
Reinforced cement sleeper, for railways
CH28307A
(en )
1904-04-30
Reinforced cement sleeper, for railways
FR434161A
(en )
1912-01-26
Reinforced cement sleeper for railways and other uses
FR427511A
(en )
1911-08-05
Reinforced concrete sleeper for railways
ES28148A1
(en )
1901-11-01
A method of manufacturing metal reinforced cement concrete sleepers developed for railroad track supports and other rail tracks.
FR368015A
(en )
1906-11-15
Reinforced cement sleeper for railways
FR323688A
(en )
1903-03-12
Reinforced cement sleepers for railways
CH76896A
(en )
1918-06-17
Reinforced concrete sleeper for railway tracks
CH14222A
(en )
1897-11-30
New rail for railways
CH40292A
(en )
1908-06-16
Reinforced concrete sleeper for railways and trams