ZA72149B
(en )
1972-09-27
Improvements in or relating to tunnelling
HK7279A
(en )
1979-02-16
Improvements in and relating to pipe cutters
ZA727361B
(en )
1974-05-29
Improvements in or relating to cutting apparatus
ZA714204B
(en )
1972-03-29
Improvements in or relating to rotary cutters
ZA724488B
(en )
1973-03-28
Improvements in or relating to hand tools
IL40723A0
(en )
1973-01-30
Improvements in or relating to hand tools
ZA737327B
(en )
1974-10-30
Improvements in or relating to mine brattices
MY7900109A
(en )
1979-12-31
Improvements in or relating to thienobenzazepines
AU458563B2
(en )
1975-02-27
Improvements in or relating to mining machines
ZA723586B
(en )
1973-03-28
Improvement in or relating to electropyrotechnic detonating devices
ZA723068B
(en )
1973-02-28
Improvements in or relating to wellpoints
ZA718425B
(en )
1973-06-27
Improvemnts in or relating to rock cutters
ZA727054B
(en )
1974-02-27
Improvements in or relating to cutters
GB1388943A
(en )
1975-03-26
Cutter devices for use in mining
AU3762572A
(en )
1973-09-27
Improvements in or relating to cutters
AU469395B2
(en )
1976-02-12
Improvements in or relating to cutter devices for use in mining
ZA715424B
(en )
1972-11-29
Improvements in or relating to glazing
ZA71753B
(en )
1972-04-26
Improvements in or relating to rock drilling
ZA71852B
(en )
1972-02-23
Improvements in or relating to cutting tools
ZA727055B
(en )
1974-02-27
Improvements in or relating to cutters
ZA724253B
(en )
1973-05-30
Improvements in or relating to cutters
ZA702649B
(en )
1971-07-28
Improvements in rock cutters
ZA7277B
(en )
1973-03-28
Improvements in or relating to rock drills
ZA716173B
(en )
1972-11-29
Improvements in rock cutting equipment
ZA728389B
(en )
1973-06-27
Improvements in or relating to structures