|
US1204157A
|
|
Disk drill.
|
|
US1209299A
|
|
Rotary boring-drill.
|
|
US1183646A
|
|
Load-indicating attachment for drilling-rigs.
|
|
US1247839A
|
|
Rotary boring-drill.
|
|
US1163540A
|
|
Adjustable bearing for drill-bit cutting-disks.
|
|
US1174578A
|
|
Rotary disk drill.
|
|
US1179314A
|
|
Lock-nut construction.
|
|
US1143275A
|
|
Domountable cutting edge for drilling-tools.
|
|
US1143274A
|
|
Rotary-disk boring-drill.
|
|
US1174576A
|
|
Rotary boring-drill.
|
|
US1174577A
|
|
Retaining means for rotary-drill cutters.
|
|
US1174575A
|
|
Reaming-drill.
|
|
US1143273A
|
|
Rotary drill.
|
|
US1143272A
|
|
Rotary boring-drill.
|
|
US1143271A
|
|
Cutter for rotary boring-drills.
|
|
US1139529A
|
|
Well-reamer.
|
|
US1136135A
|
|
Reamer.
|
|
US1136134A
|
|
Lubricating device for rotary drills.
|
|
US1130290A
|
|
Roller boring-drill.
|
|
US1131701A
|
|
Rotary boring-drill.
|
