| 2943603 | Fluid actuated impact tool | |||
| 2873093 | Combined rotary and percussion drilling apparatus | |||
| 2813516 | Pneumatic rotary drill hammer | |||
| 2813514 | Pneumatic saw and the like | |||
| 2758817 | Percussion tools for wells | |||
| 2620162 | Hammer type rotary rock-drilling bit | |||
| 1910644 | Fluid motor | |||
| 1861042 | Rotary bit with hammering device | |||
| 1369256 | Mechanical movement | |||
| 1224008 | N/A | |||
| 1173326 | N/A | |||
| 1132063 | N/A | |||
| 1104071 | N/A | |||
| 1072701 | N/A | |||
| 0890065 | N/A | |||
| 0807452 | N/A | |||
| 0583802 | N/A | |||
| 0165027 | N/A |