FR1207938A
(en )
1960-02-19
Metal support for mine gallery
FR1271386A
(en )
1961-09-08
Roof supports for mining galleries
BE583465A
(en )
1960-02-01
Process for executing segments for the support of mine galleries.
FR1250464A
(en )
1961-01-13
Process for executing segments for the support of mine galleries
FR1293962A
(en )
1962-05-18
Support process for mine galleries
FR1167177A
(en )
1958-11-21
Ring or arch support for mine galleries or tunnels
FR1101491A
(en )
1955-10-06
Mine support process
FR1242398A
(en )
1960-09-30
Gutter-shaped profile, with flanges, in particular for the support of mine galleries
FR1261055A
(en )
1961-05-12
Process for the concrete lining in intervals of shafts, in particular mine shafts
FR1281282A
(en )
1962-01-12
Mine distributor
FR1248440A
(en )
1960-12-16
Process for the boring of tunnels
FR1240306A
(en )
1960-09-02
Metal lining for mining supports
FR1207659A
(en )
1960-02-18
Support bar, in particular for the roof of timbering of mining galleries
BE582147A
(en )
1960-12-16
Support device for the bifurcations of underground galleries, and its assembly process.
BE587961A
(en )
1960-06-16
Mine support for sizes.
FR1284655A
(en )
1962-02-16
Lining panels for mine galleries
FR1230818A
(en )
1960-09-20
Improvements to roof supports for mine galleries
FR1188074A
(en )
1959-09-18
Transporters for mine galleries
FR1234998A
(en )
1960-07-01
Combined mine marking machine
FR1212988A
(en )
1960-03-28
New mine prop
FR1229504A
(en )
1960-09-07
Process for the installation of mining retaining brackets
BE582782A
(en )
1960-03-18
Gutter-shaped profile, with flanges, in particular for the support of mine galleries
BE597137A
(en )
1961-03-15
Metal post, in particular for the support of mine freezings.
BE585787A
(en )
1960-04-19
Profile for mine props
BE586799A
(en )
1960-07-22
Tunnel support for mining operations.