CH76896A
(en )
1918-06-17
Reinforced concrete sleeper for railway tracks
FR20564E
(en )
1918-07-02
Reinforced concrete sleeper for railway
FR482078A
(en )
1917-02-14
Reinforced concrete sleeper for railway
FR483879A
(en )
1917-08-17
Reinforced concrete sleepers for railway tracks
FR506118A
(en )
1920-08-14
Reinforced concrete sleeper for railway tracks
FR427511A
(en )
1911-08-05
Reinforced concrete sleeper for railways
CH82928A
(en )
1919-11-01
Reinforced concrete sleeper for railway tracks
CH75851A
(en )
1918-02-16
Reinforced concrete railway sleeper
FR632281A
(en )
1928-01-06
Reinforced concrete sleeper for railway tracks
FR434539A
(en )
1912-02-06
Improvements to concrete sleepers for railway tracks
CH71670A
(en )
1916-02-01
Reinforced concrete sleeper for rails
FR494014A
(en )
1919-08-28
Improvements to sleepers with plates or bells for railway tracks
FR485517A
(en )
1918-01-16
Rail sleeper improvements
FR434496A
(en )
1912-02-03
Monolithic superstructure for railway tracks
FR461657A
(en )
1914-01-08
Railroad tie
FR486661A
(en )
1918-04-30
Reinforced cement sleeper for railways in general
FR472365A
(en )
1914-12-03
Railroad tie
FR487969A
(en )
1918-08-09
Improvements to railway sleepers
FR461709A
(en )
1914-01-09
Crossing for railway tracks
FR477968A
(en )
1915-11-18
Rail cross member
FR480796A
(en )
1916-09-21
Reinforced cement railway sleeper
FR580776A
(en )
1924-11-15
Reinforced cement sleeper for railway tracks
FR443002A
(en )
1912-09-14
Metal sleeper for railway tracks
FR468142A
(en )
1914-06-29
Railroad track for entertainment
FR487615A
(en )
1918-07-17
Improvements at railway crossings