AU2447535A
(en )
1936-05-14
Improvements in, or relating to, drill shafts and bits adapted tobe used with percussive drills
AU104479B2
(en )
1938-07-21
Improvements in and relating to , drill shafts and detachable bits for use with rock drills
AU509837A
(en )
1938-07-21
Improvements in and relating to , drill shafts and detachable bits for use with rock drills
AU109747B2
(en )
1940-02-22
Improvements in and relating to drill shafts, drill bits, adaptors andother connectors for use with percussive drills
AU16139A
(en )
1940-02-22
Improvements in and relating to drill shafts, drill bits, adaptors andother connectors for use with percussive drills
AU2286935A
(en )
1935-12-12
Improvements in or relating to pneumatic drills, hammers and like tools
CA330651A
(en )
1933-03-07
Drill shank and bit
CA361333A
(en )
1936-10-27
Drill shaft and bit
AU1052232A
(en )
1933-06-29
Improvements in or relating to rock drills and like tools
AU111483B2
(en )
1940-09-19
Improvements in detachable drill bits and shafts for use with rock drills
AU53240A
(en )
1940-09-19
Improvements in detachable drill bits and shafts for use with rock drills
AU103458B2
(en )
Improvements in or relating to rock drills and like tools
CA357390A
(en )
1936-04-28
Detachable bit and drill
AU2200635A
(en )
1936-04-09
Improvements in rock drills
CA336890A
(en )
1933-11-07
Rock drill bit
CA304310A
(en )
1930-09-30
Drilling tool and detachable bit
CA304311A
(en )
1930-09-30
Drilling tool and detachable bit
CA355055A
(en )
1935-12-31
Stone boring tool or rock drill
AU1202333A
(en )
1934-04-12
Improvements in rock drills
CA354509A
(en )
1935-12-03
Drill bit
CA335325A
(en )
1933-09-05
Well drilling bit
CA331393A
(en )
1933-04-04
Diamond drill bit
CA331392A
(en )
1933-04-04
Diamond drill bit
CA329376A
(en )
1933-01-17
Replaceable bit rock drill
CA336733A
(en )
1933-10-31
Drill bit