"It is my heart-warmed and world-embracing Christmas hope and aspiration that all of us, the high, the low, the rich, the poor, the admired, the despised, the loved, the hated, the civilized, the savage (every man and brother of us all throughout the whole earth), may eventually be gathered together in a heaven of everlasting rest and peace and bliss, except the inventor of the telephone. "
Mark Twain ; Christmas greetings, 1890
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| Number | Title | Issue Date |
| 7503407 | Impact excavation system and method A method and system for excavating a subterranean formation using a fluid comprising pumping the fluid through at least one nozzle such that a velocity of the fluid when exiting the nozzle is greater than a velocity of the fluid entering the nozzle. A plurality of s... | 03/17/2009 |
| 7398839 | Impact excavation system and method with particle trap A system and method for excavating a subterranean formation, according to which a slurry of liquid and a plurality of impactors are introduced into at least one cavity formed in a body member and are discharged from the cavity so that the impactors remove a portion ... | 07/15/2008 |
| 7398838 | Impact excavation system and method with two-stage inductor A system and method for excavating a subterranean formation according to which a fluid is introduced into a vessel to draw a plurality of impactors into the vessel to form a suspension. The suspension is discharged from the vessel and into another vessel, and fluid ... | 07/15/2008 |
| 7383896 | Impact excavation system and method with particle separation A system and method for excavating a subterranean formation, according to which a suspension of liquid and a plurality of impactors are introduced into at least one cavity formed in a body member and are discharging from the cavity so that the impactors remove a por... | 06/10/2008 |
| 7343987 | Impact excavation system and method with suspension flow control A system and method for excavating a subterranean formation, according to which a suspension of liquid and a plurality of impactors are passed between a drill string to a body member for discharge from the body member to remove at least a portion of the formation. T... | 03/18/2008 |